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''Opuntia'', commonly called prickly pear or pear cactus, is a
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
of
flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants t ...
s in the
cactus A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Gree ...
family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Cactaceae. Prickly pears are also known as ''tuna'' (fruit), ''sabra'', '' nopal'' (paddle, plural ''nopales'') from the
Nahuatl Nahuatl (; ), Aztec, or Mexicano is a language or, by some definitions, a group of languages of the Uto-Aztecan language family. Varieties of Nahuatl are spoken by about Nahua peoples, most of whom live mainly in Central Mexico and have small ...
word for the pads, or nostle, from the Nahuatl word for the fruit; or paddle cactus. The genus is named for the
Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic pe ...
city of Opus, where, according to
Theophrastus Theophrastus (; grc-gre, Θεόφραστος ; c. 371c. 287 BC), a Greek philosopher and the successor to Aristotle in the Peripatetic school. He was a native of Eresos in Lesbos.Gavin Hardy and Laurence Totelin, ''Ancient Botany'', Routle ...
, an edible plant grew and could be propagated by rooting its leaves. The most common culinary species is the
Indian fig opuntia ''Opuntia ficus-indica'', the Indian fig opuntia, fig opuntia, or prickly pear, is a species of cactus that has long been a domesticated crop plant grown in agricultural economies throughout arid and semiarid parts of the world. ''O. ficus-indica ...
(''O. ficus-indica'').


Description

''O. ficus-indica'' is a large, trunk-forming, segmented cactus that may grow to with a crown of over in diameter and a trunk diameter of . Cladodes (large pads) are green to blue-green, bearing few spines up to or may be spineless. Prickly pears typically grow with flat, rounded cladodes (also called platyclades) containing large, smooth, fixed spines and small, hairlike prickles called
glochid Glochids or glochidia (singular "glochidium") are hair-like spines or short prickles, generally barbed, found on the areoles of cacti in the sub-family ''Opuntioideae''. Cactus glochids easily detach from the plant and lodge in the skin, causin ...
s that readily adhere to skin or hair, then detach from the plant. The flowers are typically large, axillary, solitary, bisexual, and epiperigynous, with a
perianth The perianth (perigonium, perigon or perigone in monocots) is the non-reproductive part of the flower, and structure that forms an envelope surrounding the sexual organs, consisting of the calyx (sepals) and the corolla ( petals) or tepals when ...
consisting of distinct, spirally arranged
tepal A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals. This may be because the parts of the perianth are undifferentiated (i.e. of very ...
s and a
hypanthium In angiosperms, a hypanthium or floral cup is a structure where basal portions of the calyx, the corolla, and the stamens form a cup-shaped tube. It is sometimes called a floral tube, a term that is also used for corolla tube and calyx tube. It ...
. The
stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the fila ...
s are numerous and in spiral or whorled clusters, and the
gynoecium Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) '' pist ...
has numerous inferior ovaries per carpel. Placentation is parietal, and the fruit is a berry with arillate seeds. Prickly pear species can vary greatly in habit; most are shrubs, but some, such as ''
Opuntia galapageia ''Opuntia galapageia'' is a species of cactus. It is endemic to the Galápagos Islands, part of Ecuador. Forms occurring on different islands have been treated as separate species and subtaxa of these species. ''Opuntia echios'', ''Opuntia hell ...
'' of the Galápagos, are trees.


Growth

File:Prickly Pear 2.JPG, Bud appears ► File:Prickly pear leaf bud.JPG, Bud grows ► File:Prickly Pear 2half.JPG, Bud begins pad transformation ► File:Opuntia leaf.JPG, Bud completes pad transformation ► File:Prickly Pear 4half.JPG, Pad continues growth ► File:Prickly Pear 5half.JPG, Edible pad (tender) ► File:Prickly Pear 5.JPG, Mature pad


Chemistry

''Opuntia'' contains a range of
phytochemicals Phytochemicals are chemical compounds produced by plants, generally to help them resist fungi, bacteria and plant virus infections, and also consumption by insects and other animals. The name comes . Some phytochemicals have been used as pois ...
in variable quantities, such as polyphenols, dietary minerals and betalains. Identified compounds under basic research include
gallic acid Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6 H2( OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants ...
, vanillic acid and catechins, as examples. The Sicilian prickly pear contains betalain, betanin, and indicaxanthin, with highest levels in their fruits.


Taxonomy

When
Carl Linnaeus Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, ...
published ''
Species Plantarum ' (Latin for "The Species of Plants") is a book by Carl Linnaeus, originally published in 1753, which lists every species of plant known at the time, classified into genera. It is the first work to consistently apply binomial names and was the ...
'' in 1753 – the starting point for modern botanical nomenclature – he placed all the species of cactus known to him in one genus, ''Cactus''. In 1754, the Scottish botanist Philip Miller divided them into several genera, including ''Opuntia''. He distinguished the genus largely on the form of its flowers and fruits. Considerable variation of taxonomy occurs within ''Opuntia'' species, resulting in names being created for variants or subtypes within a species, and use of
DNA sequencing DNA sequencing is the process of determining the nucleic acid sequence – the order of nucleotides in DNA. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine. T ...
to define and isolate various species.


Species

''Opuntia'' hybridizes readily between species. This can make classification difficult, yielding a reticulate phylogeny where different species come together in hybridization. ''Opuntia'' also has a tendency for
polyploid Polyploidy is a condition in which the cells of an organism have more than one pair of ( homologous) chromosomes. Most species whose cells have nuclei ( eukaryotes) are diploid, meaning they have two sets of chromosomes, where each set conta ...
y. The ancestral diploid state was 2n=22, but many species are hexaploid (6n = 66) or octaploid (8n = 88). Species accepted by
Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...
, , are listed below, together with some species accepted by other sources, where the name preferred by Plants of the World Online is also given. *'' Opuntia abjecta'' Small ex Britton & Rose *'' Opuntia aciculata'' Griffiths – Chenille prickly pear, old man's whiskers, cowboy's red whiskers * ''Opuntia'' × ''aequatorialis'' Britton & Rose * ''Opuntia'' × ''alta'' Griffiths *'' Opuntia altomagdalenensis'' Xhonneux *'' Opuntia amarilla'' Griffiths *'' Opuntia ammophila'', synonym of '' Opuntia austrina'' *'' Opuntia anacantha'', synonym of ''
Opuntia elata ''Opuntia elata'' is a species of cactus found in Bolivia, Paraguay, southern Brazil, northern Argentina, and Uruguay. , Plants of the World Online accepted three varieties: *''Opuntia elata'' var. ''delaetiana'' F.A.C.Weber *''Opuntia elata'' v ...
'' var. ''elata'' *'' Opuntia anahuacensis'' Griffiths * ''Opuntia'' × ''andersonii'' H.M.Hern., Gómez-Hin. & Bárcenas *'' Opuntia arechavaletae'' Speg. *'' Opuntia arenaria'', synonym of ''
Opuntia polyacantha ''Opuntia polyacantha'' is a common species of cactus known by the common names plains pricklypear,Johnson, K. A. 2000''Opuntia polyacantha''.In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mount ...
'' var. ''arenaria'' – dune prickly pear; diploid (2n=22) *''Opuntia articulata'', synonym of ''
Tephrocactus articulatus ''Tephrocactus articulatus'' is a species of cactus in the subfamily Opuntioideae of the plant family Cactaceae. They usually grow branches up to one foot tall with white flowers. Propagation is usually through cuttings. Stem segments easily br ...
'' *'' Opuntia atrispina'' Griffiths *'' Opuntia auberi'' Pfeiff. *'' Opuntia aurantiaca'' Lindl. *'' Opuntia aurea'' E.M.Baxter – hexaploid (2n=66) *'' Opuntia aureispina'' (S.Brack & K.D.Heil) Pinkava & B.D.Parfitt *'' Opuntia austrina'' Small *'' Opuntia azurea'' Rose *''
Opuntia basilaris ''Opuntia basilaris'', the beavertail cactus or beavertail pricklypear, is a cactus species found in the southwest United States. It occurs mostly in the Mojave, Anza-Borrego, and Colorado Deserts, as well as in the Colorado Plateau and northw ...
'' Engelm. & J.M.Bigelow – beavertail cactus; diploid (2n=22) *'' Opuntia bentonii'', synonym of ''
Opuntia stricta ''Opuntia stricta'' is a species of large cactus that is endemic to the subtropical and tropical coastal areas of the Americas, especially around the Caribbean. Common names include erect prickly pear and nopal estricto (Spanish). The first desc ...
'' *'' Opuntia bonplandii'' (Kunth) F.A.C.Weber *'' Opuntia bravoana'' E.M.Baxter *'' Opuntia caboensis'' F.Mercado & León de la Luz *'' Opuntia cacanapa'', synonym of ''
Opuntia engelmannii ''Opuntia engelmannii'' is a prickly pear common across the south-central and Southwestern United States and northern Mexico. It goes by a variety of common names, including desert prickly pear, discus prickly pear, Engelmann's prickly pear in ...
'' var. ''cacanapa'' *'' Opuntia camanchica'' Engelm. & J.M.Bigelow *'' Opuntia caracassana'' Salm-Dyck * ''Opuntia'' × ''carstenii'' R.Puente & C.Hamann *'' Opuntia cespitosa'' Raf. *'' Opuntia chaffeyi'' Britton & Rose * ''Opuntia'' × ''charlestonensis'' Clokey *'' Opuntia chiangiana'' Scheinvar & Manzanero *'' Opuntia chisosensis'' (M.S.Anthony) D.J.Ferguson *''
Opuntia chlorotica ''Opuntia chlorotica'' is a species of plant in the family Cactaceae. It is a species of prickly pear native to the southwestern United States and northern Mexico. Its common names include pancake prickly pear, flapjack prickly pear and dollarjo ...
'' Engelm. & J.M.Bigelow – pancake prickly pear; native to southwest USA and the Sonoran and
Mojave desert The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily ...
s; diploid (2n=22) *'' Opuntia clarkiorum'' Rebman *'' Opuntia cochenillifera'' (L.) Mill. * ''Opuntia'' × ''cochinera'' Griffiths * ''Opuntia'' × ''coloradensis'' D.J.Barnett & Donnie Barnett * ''Opuntia'' × ''columbiana'' Griffiths *'' Opuntia crassa'' Haw. *'' Opuntia crystalenia'' Griffiths *'' Opuntia cubensis'' Britton & Rose *'' Opuntia curassavica'' (L.) Mill. * ''Opuntia'' × ''curvispina'' Griffiths *'' Opuntia deamii'' Rose * ''Opuntia'' × ''debreczyi'' Szutorisz *'' Opuntia decumbens'' Salm-Dyck *''
Opuntia dejecta ''Opuntia dejecta'' is a species of plant in the cactus family. They are listed in cites appendix ii CITES (shorter name for the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington C ...
'' Salm-Dyck *'' Opuntia delafuentiana'' Martínez-Gonz., Luna-Vega, Gallegos & García-Sand. * ''Opuntia'' × ''demissa'' Griffiths *'' Opuntia depressa'' Rose *''
Opuntia dillenii ''Opuntia dillenii'' is a species of prickly pear native to the tropical and subtropical Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Ame ...
'' (Ker Gawl.) Haw. *'' Opuntia diploursina'', synonym of ''
Opuntia polyacantha ''Opuntia polyacantha'' is a common species of cactus known by the common names plains pricklypear,Johnson, K. A. 2000''Opuntia polyacantha''.In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mount ...
'' var. ''erinacea'' – found around Grand Canyon and Lake Mead National Recreation Area; diploid (2n=22); resembles ''O. trichophora'' *'' Opuntia discolor'' Britton & Rose *'' Opuntia drummondii'' Graham *'' Opuntia dulcis'' Engelm. *''Opuntia echinocarpa'' - see ''
Cylindropuntia echinocarpa ''Cylindropuntia echinocarpa'' is a species of cactus known by the common names silver cholla, golden cholla, and Wiggins' cholla. It was formerly named ''Opuntia echinocarpa''.
'' *'' Opuntia eichlamii'' Rose *''
Opuntia elata ''Opuntia elata'' is a species of cactus found in Bolivia, Paraguay, southern Brazil, northern Argentina, and Uruguay. , Plants of the World Online accepted three varieties: *''Opuntia elata'' var. ''delaetiana'' F.A.C.Weber *''Opuntia elata'' v ...
'' Link & Otto ex Salm-Dyck *''
Opuntia elatior ''Opuntia'', commonly called prickly pear or pear cactus, is a genus of flowering plants in the cactus family Cactaceae. Prickly pears are also known as ''tuna'' (fruit), ''sabra'', ''nopal'' (paddle, plural ''nopales'') from the Nahuatl word f ...
'' Mill. *'' Opuntia elizondoana'' E.Sánchez & Villaseñor *''
Opuntia engelmannii ''Opuntia engelmannii'' is a prickly pear common across the south-central and Southwestern United States and northern Mexico. It goes by a variety of common names, including desert prickly pear, discus prickly pear, Engelmann's prickly pear in ...
'' Salm-Dyck ex Engelm. – Engelmann's prickly pear, cow's-tongue prickly pear, desert prickly pear, discus prickly pear, Texas prickly pear, calico cactus; hexaploid (2n=66) *''Opuntia escuintlensis'' (Matuda) Lodé *''Opuntia excelsa'' Sánchez-Mej. *''Opuntia feroacantha'' Britton & Rose *''Opuntia ficus-indica'' (L.) Mill. – Indian fig opuntia, cultivated *''Opuntia fragilis'' (Nutt.) Haw. – little prickly pear, brittle cactus, found in the Great Plains, parts of the Midwest and in several Canadian provinces, up to 56°N. *''Opuntia fuliginosa'' Griffiths *''
Opuntia galapageia ''Opuntia galapageia'' is a species of cactus. It is endemic to the Galápagos Islands, part of Ecuador. Forms occurring on different islands have been treated as separate species and subtaxa of these species. ''Opuntia echios'', ''Opuntia hell ...
'' Hensl. – Galápagos prickly pear, Galápagos Islands *''Opuntia gallegiana'' Scheinvar & Olalde *''Opuntia gosseliniana'' F.A.C.Weber – violet prickly pear *''Opuntia guatemalensis'' Britton & Rose *''Opuntia guilanchii'' Griffiths *''Opuntia hitchcockii'' J.G.Ortega *''Opuntia hondurensis'' Standl. *''Opuntia howeyi'' J.A.Purpus *''Opuntia huajuapensis'' Bravo *''Opuntia humifusa'' (Raf.) Raf. – eastern prickly pear (sometimes included in ''O. compressa''); tetraploid (2n=44); range includes humid regions of Eastern United States and northerly regions into Canada *''Opuntia hyptiacantha'' F.A.C.Weber *''Opuntia inaequilateralis'' A.Berger *''Opuntia inaperta'' (Schott ex Griffiths) D.R.Hunt *''Opuntia invicta'', synonym of ''Grusonia invicta'' *''Opuntia jaliscana'' Bravo *''Opuntia lagunae'' E.M.Baxter *''Opuntia lasiacantha'' Pfeiff. *''Opuntia leucotricha'' DC. – arborescent prickly pear, Aaron's beard cactus, semaphore cactus, ''Duraznillo blanco'', ''nopal blanco'' *''Opuntia lindheimeri'' – cowtongue prickly pear *''Opuntia littoralis'' (Engelm.) Cockerell – coastal prickly pear, sprawling prickly pear *''Opuntia lutea'' (Rose) D.R.Hunt *''Opuntia mackensenii'' Rose *''Opuntia macrocentra'' Engelm. – black-spined prickly pear, purple prickly pear, found in southwest USA and northern Mexico *''Opuntia macrorhiza'' Engelm. – Plains prickly pear, found throughout the Great Plains except for the northernmost areas (not found in North Dakota), and extending sporadically eastward as far as Kentucky; tetraploid (2n=44) *''Opuntia mantaroensis'' Guiggi *''Opuntia matudae'' Scheinvar – ''xoconostle'' (syn. ''O. joconostle'') *''Opuntia maxima'' Mill. *''Opuntia megapotamica'' Arechav. *''Opuntia megarrhiza'' Rose *''Opuntia mesacantha'' Raf. *''Opuntia microdasys'' (Lehm.) Pfeiff. – bunny ears cactus, polka-dot cactus *''Opuntia militaris'' Britton & Rose *''Opuntia monacanthos'' (Willd.) Haw. (also spelt ''Opuntia monacantha, O. monacantha'') – common prickly pear *''Opuntia nemoralis'' Griffiths *Opuntia × occidentalis, ''Opuntia'' × ''occidentalis'' Engelm. & J.M.Bigelow *''Opuntia ochrocentra'' Small ex Britton & Rose *''Opuntia orbiculata'' Salm-Dyck ex Pfeiff. *''Opuntia oricola'' Philbrick *''Opuntia pachyrrhiza'' H.M.Hern., Gómez-Hin. & Bárcenas *''Opuntia pailana'', synonym of ''Opuntia leucotricha, O. leucotricha'' *''Opuntia parviclada'' S.Arias & Gama *''Opuntia peckii'' J.A.Purpus *''Opuntia perotensis'' Scheinvar, Olalde & Gallegos *''Opuntia phaeacantha'' Engelm. – tulip prickly pear, includes plateau prickly pear, brown-spined prickly pear, Mojave prickly pear, Kingman prickly pear; hexaploid (2n=66) *''Opuntia picardoi'', synonym of ''Airampoa erectoclada'' *''Opuntia pilifera'' F.A.C.Weber *''Opuntia pinkavae'' B.D.Parfitt – Pinkava prickly pear; octoploid (2n=88), named in honor of Donald John Pinkava *''Opuntia pittieri'' Britton & Rose *''
Opuntia polyacantha ''Opuntia polyacantha'' is a common species of cactus known by the common names plains pricklypear,Johnson, K. A. 2000''Opuntia polyacantha''.In: Fire Effects Information System, nline U.S. Department of Agriculture, Forest Service, Rocky Mount ...
'' Haw. – Plains prickly pear, Starvation Prickly pear, Panhandle prickly pear, found in the Great Plains, Great Basin, Mojave Desert, Colorado Plateau, and the Rocky Mountains, syn. ''Opuntia rhodantha'' K.Schum.; tetraploid (2n=44) *''Opuntia pottsii'' Salm-Dyck *''Opuntia preciadoae'' Scheinvar, Olalde, Gallegos & J.Morales S. *''Opuntia puberula'' Pfeiff. *''Opuntia pubescens'' H.L.Wendl. ex Pfeiff. *''Opuntia pycnantha'' Engelm. *''Opuntia quimilo'' K.Schum. *''Opuntia quitensis'' F.A.C.Weber – Red Buttons opuntia (syn. ''Opuntia macbridei'', ''Opuntia johnsonii'', ''Platyopuntia quitensis)'' *''Opuntia rastrera'' F.A.C.Weber *''Opuntia repens'' Bello *''Opuntia retrorsa'' Speg. *''Opuntia ritteri'' A.Berger *''Opuntia robinsonii'' J.G.Ortega *''Opuntia robusta'' H.L.Wendl. ex Pfeiff. *Opuntia × rooneyi, ''Opuntia'' × ''rooneyi'' M.P.Griff. *''Opuntia rufida'' Engelm. *''Opuntia rzedowskii'' Scheinvar *''Opuntia sanguinea'' Proctor *''Opuntia scheeri'' F.A.C.Weber *''Opuntia schumannii'' F.A.C.Weber ex A.Berger *''Opuntia setispina'' Engelm., synonym of ''Opuntia pottsii'' *''Opuntia setocarpa'' Arreola-Nava, Guzm.-Hern. & Cuevas *''Opuntia sierralagunensis'' León de la Luz & F.Mercado *''Opuntia soederstromiana'' Britton & Rose *''Opuntia spinosibacca'' M.S.Anthony *''Opuntia spinulifera'' Salm-Dyck *''Opuntia stenarthra'' K.Schum. *''Opuntia stenopetala'' Engelm. *''Opuntia streptacantha'' Lem. *''
Opuntia stricta ''Opuntia stricta'' is a species of large cactus that is endemic to the subtropical and tropical coastal areas of the Americas, especially around the Caribbean. Common names include erect prickly pear and nopal estricto (Spanish). The first desc ...
'' (Haw.) Haw. – erect prickly pear, spineless prickly pear *''Opuntia strigil'' Engelm. *''Opuntia sulphurea'' G.Don ex Salm-Dyck *''Opuntia tapona'' Engelm. ex J.M.Coult. *''Opuntia tehuacana'' S.Arias & U.Guzmán *''Opuntia tehuantepecana'' (Bravo) Bravo *''Opuntia tezontepecana'' Gallegos & Scheinvar *''Opuntia tomentosa'' Salm-Dyck – woollyjoint prickly pear *''Opuntia tortispina'' Engelm. & J.M.Bigelow *''Opuntia triacanthos'' (Willd.) Sweet (also spelt ''Opuntia triacantha'') *''Opuntia trichophora'' diploid (2n=22) *''Opuntia tuna'' (L.) Mill. *''Opuntia tunoidea'' Gibbes *Opuntia × vaseyi, ''Opuntia'' × ''vaseyi'' (J.M.Coult.) Britton & Rose *''Opuntia velutina'' F.A.C.Weber *''Opuntia wilcoxii'' Britton & Rose *''Opuntia zacuapanensis'' A.Berger *''Opuntia zamudioi'' Scheinvar


Formerly in ''Opuntia''

* ''Austrocylindropuntia'' * ''Brasiliopuntia'' * ''Corynopuntia'' * ''Cylindropuntia'' * ''Disocactus phyllanthoides'' (as ''O. speciosa'') * ''Micropuntia'' * ''Miqueliopuntia''


Chollas

Chollas, now recognized to belong to the distinct genus ''Cylindropuntia'', are distinguished by having cylindrical, rather than flattened, stem segments with large barbed spines. The stem joints of several species, notably the jumping cholla (''C. fulgida''), are very brittle on young stems, readily breaking off when the barbed spines stick to clothing or animal fur as a method of vegetative reproduction. The barbed spines can remain embedded in the skin, causing discomfort and sometimes injury.


Breeding

One of the ancient homes of the cactus pear, Mexico, ran a crop breeding program, breeding program in the 1960s. This effort at the Antonio Narro Agrarian Autonomous University (Universidad Autónoma Agraria Antonio Narro, UAAAN) produced improvements in some traits including cold-hardiness.


Distribution and habitat

Like most true cactus species, prickly pears are native only to the Americas. Through human actions, they have since been introduced to many other areas of the world. Prickly pear species are found in abundance in Mexico, especially in the central and western regions, and in the Caribbean islands (West Indies). In the United States, prickly pears are native to many areas of the arid, semiarid, and drought-prone Western United States, Western and South Central United States, South Central United States, including the lower elevations of the Rocky Mountains and southern Great Plains, where species such as ''Opuntia phaeacantha, O. phaeacantha'' and ''Opuntia polyacantha, O. polyacantha'' become dominant, and to the desert Southwest, where several types are endemic. Prickly pear cactus is also native to sandy coastal beach scrub environments of the East Coast of the United States, East Coast from Florida to southern Connecticut, where ''Opuntia humifusa, O. humifusa'', ''Opuntia stricta, O. stricta'', and ''Opuntia pusilla, O. pusilla'', are found from the East Coast south into the Caribbean and the Bahamas. Additionally, the eastern prickly pear is native to the midwestern "sand prairies" nearby major river systems, such as the Mississippi, Illinois, and Ohio rivers. The plant also occurs naturally in hilly areas of southern Illinois, and sandy or rocky areas of northern Illinois. ''Opuntia'' species are the most cold-tolerant of the lowland cacti, extending into western and southern Canada; one subspecies, Opuntia fragilis, ''O. fragilis'' var. ''fragilis'', has been found growing along the Beatton River in central British Columbia, southwest of Cecil Lake at 56° 17’ N latitude and 120° 39’ W longitude. Others are seen in the Kleskun Hills Natural Area of north-west Alberta at 55° 15’ 30’’ N latitude and 118° 30’ 36’’ W longitude. Prickly pears also produce a fruit, commonly eaten in Mexico and in the Mediterranean region, known as ''tuna''; it also is used to make ''aguas frescas''. The fruit can be red, wine-red, green, or yellow-orange. In the Galápagos Islands, the Galápagos prickly pear, Opuntia galapageia, ''O. galapageia'', has previously been treated as a number of different species, but is now only divided into varieties and subvarieties. Most of these are confined to one or a few islands, so they have been described as "an excellent example of adaptive radiation". On the whole, islands with tall, trunked varieties have giant tortoises, and islands lacking tortoises have low or prostrate forms of ''Opuntia''. Prickly pears are a prime source of food for the common giant tortoises in the Galápagos Islands, so they are important in the food web. Charles Darwin was the first to note that these cacti have thigmotaxis, thigmotactic anthers; when the anthers are touched, they curl over, depositing their pollen. This movement can be seen by gently poking the anthers of an open ''Opuntia'' flower. The same trait has convergent evolution, evolved convergently in other species (e.g. ''Lophophora''). The first introduction of prickly pears into Australia is ascribed to Governor Arthur Phillip, Phillip and the earliest colonists in 1788. Brought from Brazil to Sydney, prickly pear grew in Sydney, New South Wales, where they were rediscovered in a farmer's garden in 1839. They appear to have spread from New South Wales and caused great ecological damage in the eastern states. They are also found in the Mediterranean region of Northern Africa, especially in Algeria, Morocco and Tunisia, where they grow all over the countryside, and in parts of Southern Europe, especially Spain, where they grow in the east, south-east, and south of the country, and also in Malta, where they grow all over the islands. They can be found in enormous numbers in parts of South Africa, where they were introduced from South America. Prickly pears are considered an invasive species in Prickly pears in Australia, Australia, Ethiopia, South Africa, and Hawaii, among other locations. Prickly pears (mostly ''O. stricta'') were originally imported into Europe during the 1500s and Australia in the 18th century for gardens, and were later used as a natural agricultural fencingPatterson, Ewen K. 1936. The World's First Insect Memorial. "The Review of the River Plate", December pp. 16–17 and in an attempt to establish a cochineal dye industry. In Australia, they quickly became a widespread invasive weed, eventually converting of farming land into an impenetrable green jungle of prickly pear, in places high. Scores of farmers were driven off their land by what they called the "green hell"; their abandoned homes were crushed under the cactus growth, which advanced at a rate of per year. In 1919, the Government of Australia, Australian federal government established the Commonwealth Prickly Pear Board to coordinate efforts with state governments to eradicate the weed. Early attempts at mechanical removal and poisonous chemicals failed, so in a last resort, biological control was attempted. The moth ''Cactoblastis cactorum'', from South America, whose larvae eat prickly pear, was introduced in 1925 and rapidly reduced the cactus population. Alan Parkhurst Dodd, Alan Dodd, the son of the noted entomologist Frederick Parkhurst Dodd, was a leading official in combating the prickly pear menace. A memorial hall in Chinchilla, Queensland, commemorates the moth. The release of cochineal insects that eat the cactus and simultaneously kill the plant has proven an effective measure for combatting the spread. Natural distribution occurs via consumption and seed dispersal by many animals, including antelopes, nonhuman primates, elephants, birds, and humans. When ingested by elephants, the sharp components of the plant cause harm to the mouth, stomach, and intestines.


Ecology

''O. ficus-indica'' thrives in regions with mild winters having a prolonged dry spell followed by hot summers with occasional rain and relatively low humidity. A mean annual rainfall of provides good growth rates. ''O. ficus-indica'' proliferates in various soils ranging from subacid to subalkaline, with clay content not exceeding 15–20% and the soil well-drained. The shallow root system enables the plant to grow in shallow, loose soils, such as on mountain slopes. ''Opuntia'' spreads into large clonal colonies, which contribute to its being considered a noxious weed in some places. Animals that eat ''Opuntia'' include the prickly pear island snail and ''Cyclura'' rock iguanas. The fruit are relished by many arid-land animals, chiefly birds, which thus help distribute the seeds. ''Opuntia'' pathogens include the sac fungus ''Colletotrichum coccodes'' and Sammons' Opuntia virus, Sammons' ''Opuntia'' virus. The ant ''Crematogaster opuntiae'' and the spider ''Theridion opuntia'' are named because of their association with prickly pear cactus.


Toxicity

Although the plants are edible, the pointed hairs should not be eaten, and similar species with milky sap are suspect.


Uses


Nutrition

Raw opuntia leaves are 88% water, 10% carbohydrates, and less than 1% both of protein and fat. In a reference serving, raw leaves provide of food energy, 17% of the Daily Value (DV) for vitamin C, and 24% DV for magnesium, with no other micronutrients in significant content.


Regional food uses

The fruit of prickly pears, commonly called cactus fruit, cactus fig, Indian fig (meaning "Indigenous peoples of the Americas, Native American", not India), ''nopales'' or ''tuna'' in Spanish, is edible, although it must be peeled carefully to remove the small spines on the outer skin before consumption. If the outer layer is not properly removed,
glochid Glochids or glochidia (singular "glochidium") are hair-like spines or short prickles, generally barbed, found on the areoles of cacti in the sub-family ''Opuntioideae''. Cactus glochids easily detach from the plant and lodge in the skin, causin ...
s can be ingested, causing discomfort of the throat, lips, and tongue, as the small spines are easily lodged in the skin. Indigenous peoples of the Americas, Native Americans like the Tequesta would roll the fruit around in a suitable medium (e.g. wikt:grit, grit) to "sandpaper, sand" off the glochids. Alternatively, rotating the fruit in the flame of a campfire or torch has been used to remove the glochids. Today, Parthenocarpy, parthenocarpic (seedless) cultivars are also available. The seeds can be used for flour. In Mexico, prickly pears are often used to make appetizers, soups, salads, entrees, vegetable dishes, breads, desserts, beverages, candy, fruit preserves, jelly, and drinks. The young Plant stem, stem segments, usually called pads or ''nopales'', are also edible in most species of ''Opuntia''. They are commonly used in Mexican cuisine in dishes such as ''huevos con nopales'' (egg (food), eggs with nopal), or ''tacos de nopales''. ''Nopales'' are also an important ingredient in New Mexican cuisine. In 2009 it was introduced as a cheaper alternative to corn for the production of tortillas and other corn products. They can also be pickled. ''Opuntia ficus-indica'' has been introduced to Europe, and flourishes in areas with a suitable climate, such as the south of France and southern Italy: In Sicily, they are referred to as ''fichi d'India'' (Italian literal translation of Indian fig) or ''ficurinia'' (Sicilian language literal translation of Indian fig). In Sardinia, they are called ''figumorisca'' – Moorish figs), the same denomination they receive along the Catalan_language, Catalan-speaking regions of the Western Mediterranean, ''figa de moro''. They can be found also in the Struma River in Bulgaria, in southern Portugal and Madeira (where they are called ''tabaibo'', ''figo tuno'', or "Indian figs"), in Andalusia, Spain (where they are known as ''higos chumbos''). In Greece, it grows in such places as the Peloponnese region, Ionian Islands, or Crete, and its figs are known as ''frangosyka'' (Frankish, i.e. Western European, figs) or ''pavlosyka'' (Paul's figs), depending on the region. In Albania, they are called ''fiq deti'' translated as 'sea figs', and are present in the south-west shore. The figs are also grown in Cyprus, where they are known as ''papoutsósyka'' or ''babutsa'' (shoe figs). The prickly pear also grows widely on the islands of Malta, where it is enjoyed by the Maltese as a typical summer fruit (known as ''bajtar tax-xewk'', literally 'spiny figs'), as well as being used to make the popular liqueur known as ''bajtra''. The prickly pear is so commonly found in the Maltese islands, it is often used as a dividing wall between many of Malta's characteristic terraced fields in place of the usual rubble walls. The prickly pear was introduced to Eritrea during the period of Italian colonisation between 1890 and 1940. It is locally known there as ''beles'' and is abundant during the late summer and early autumn (late July through September). The ''beles'' from the holy monastery of Debre Bizen is said to be particularly sweet and juicy. In Morocco, Tunisia, Libya, Saudi Arabia, Jordan, and other parts of North Africa and the Middle East such as Israel, prickly pears of the yellow and orange varieties are grown by the side of farms, beside railway tracks and other otherwise noncultivable land. It is sold in summer by street vendors, and is considered a refreshing fruit for that season. In Libya, it is a popular summer fruit and called by the locals ''Hindi'', which literally means ''Indian''. ''Tungi'' is the local Saint Helena, St. Helenian name for cactus pears. The plants (Opuntia ficus-indica, Indian fig opuntia) were originally brought to the island by the colonial ivory traders from East Africa in the 1850s. ''Tungi'' cactus now grows wild in the dry coastal regions of the island. Three principal cultivars of ''tungi'' grow on the island: the 'English' with yellow fruit; the 'Madeira' with large red fruit; and the small, firm 'spiny red'.Tungi also gives its name to a local Spirit distilled at The St Helena distillery at Alarm Forest, the most remote distillery in the world, made entirely from the opuntia cactus. Cactus pear is being promoted and researched by ICARDA for India, Jordan, and Pakistan especially. It is an underappreciated crop in these countries and has undergone recent expansion in cultivated area. In some particularly promising areas of India and Pakistan it has given a 30% increase in milk yield /hectare (/acre).


Folk medicine

In Mexican folk medicine, its pulp and juice are considered treatments for wounds and inflammation of the digestive tract, digestive and urinary tracts, although there is no evidence-based medicine, high-quality evidence for any clinical benefit of using opuntia for these purposes. Prior to modern medicine, Native Americans and Mexicans primarily used ''Opuntia'' as a coagulant for open wounds, using the pulp of the stem either by splitting the stem or scraping out the pulp. In one recent study, it was found that ''Opuntia'' aided in the prevention or slow down of diabetes, obesity, metabolic syndrome, cardiovascular disease, and some cancers. The results of the group that was taking ''Opuntia'' showed a reduction in BMI, body composition, and waist circumference when compared to the placebo group.


Other uses


In dye production

''Dactylopius coccus'' is a scale insect from which cochineal dye is derived. ''D. coccus'' itself is native to tropical and subtropical South America and Mexico. This insect, a primarily Sessility (zoology), sessile parasite, lives on cactus, cacti from the genus ''Opuntia'', feeding on moisture and nutrients in the cactus sap. The insect produces carminic acid, which deters predation by other insects. The carminic acid can be extracted from the insect's body and eggs to make the red dye. Cochineal is used primarily as a red food colouring and for cosmetics. The cochineal dye was used by the Aztec and Maya civilization, Maya peoples of Central and North America, and by the Inca in South America. Produced almost exclusively in Oaxaca, Oaxaca, Oaxaca, Mexico, by indigenous producers, cochineal became Mexico's second-most valued export after silver. The dyestuff was consumed throughout Europe, and was so highly valued, its price was regularly quoted on the London and Amsterdam Commodity Exchanges. The biggest producers of cochineal are Peru, the Canary Islands, and Chile. Current health concerns over artificial food additives have renewed the popularity of cochineal dyes, and the increased demand is making cultivation for insect farming an attractive opportunity in other regions, such as in Mexico, where cochineal production had declined again owing to the numerous natural enemies of the scale insect. Apart from cochineal, the red dye betanin can be extracted from some ''Opuntia'' plants themselves.


For animal fodder

Cactus is used as a fodder crop for animals in arid and dryland regions. Some farmers prepare it with a fermentation produce, to remove the spines, and increase the digestibility.


As a source of "vegan leather"

The thick skin of nopal cactus can be harvested as an environmentally-friendly leather replacement.


For fuel

Bioethanol can be produced from some ''Opuntia'' species.


For bioplastic

Nopal juice can be used to produce bioplastic.


Culture

The prickly pear cactus has been used for centuries both as a food source and a natural fence that keeps in livestock and marks the boundaries of family lands. They are resilient and often grow back following removal. The 1975–1988 version of the Coat of arms of Malta#Emblem between 1975 and 1988, emblem of Malta also featured a prickly pear, along with a Dgħajsa, traditional ''dgħajsa'', a shovel and pitchfork, and the rising sun. The cactus lends its name to a song by British jazz/classical group Portico Quartet. The song "My Rival", on the album ''Gaucho (album), Gaucho'' by the American jazz-pop group Steely Dan begins with the words, "The wind was driving in my face/The smell of prickly pear." In the fall of 1961, Cuba had its troops plant an barrier of ''Opuntia'' cactus along the northeastern section of the fence surrounding the Guantanamo Bay Naval Base to stop Cubans from escaping Cuba to take refuge in the United States. This was dubbed the "Cactus Curtain", an allusion to Europe's Iron Curtain and the Bamboo Curtain in East Asia. Uruguayan-born footballer Bruno Fornaroli is nicknamed prickly pear due to his sometimes spiky hairstyles.


Mexico

The coat of arms of Mexico depicts a Mexican golden Eagle (heraldry), eagle, perched upon an ''Opuntia''
cactus A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Gree ...
, holding a rattlesnake. According to the official history of Mexico, the coat of arms is inspired by an Aztec legend regarding the founding of Tenochtitlan. The Aztecs, then a nomadic tribe, were wandering throughout Mexico in search of a divine sign to indicate the precise spot upon which they were to build their capital. Their god Huitzilopochtli had commanded them to find an eagle devouring a snake, perched atop a cactus that grew on a rock submerged in a lake. After 200 years of wandering, they found the promised sign on a small island in the swampy Lake Texcoco. There they founded their new capital, Tenochtitlan. The cactus (''O. ficus-indica'';
Nahuatl Nahuatl (; ), Aztec, or Mexicano is a language or, by some definitions, a group of languages of the Uto-Aztecan language family. Varieties of Nahuatl are spoken by about Nahua peoples, most of whom live mainly in Central Mexico and have small ...
: ''tenochtli''), full of fruits, is the symbol for the island of Tenochtitlan.


Israeli-born Jew

The cactus fig is called ''tzabar'' in Hebrew ( he, צבר). This cactus is also the origin of the term "''Sabra (person), Sabra''" used to describe any Israeli Jews, Jew born in Israel. The allusion is to a thorny, spiky skin on the outside, but a soft, sweet interior, suggesting, though the Israeli Sabras are rough on the outside, they are sweet and sensitive once one gets to know them. This term is might be derived from an Arabic word for this cactus صبار ''ṣubbār'', where the related term ''sabr'' also translates to "patience" or "tenacity".


See also

* Sabra (comics) * Sabra (person)


References


External links

* * *Argiope argentata#Habitat and distribution {{Authority control Opuntia, Cacti of the United States Cacti of Mexico Cacti of South America Flora of South America Flora of Central America North American desert flora Mesoamerican cuisine Ayahuasca Desert fruits Medicinal plants Mexican cuisine Mexican alcoholic drinks Opuntioideae genera Plants used in Native American cuisine Taxa named by Philip Miller