Liliales
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Liliales is an order of monocotyledonous
flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...
s in the Angiosperm Phylogeny Group and Angiosperm Phylogeny Web
system A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its open system (systems theory), environment, is described by its boundaries, str ...
, within the lilioid monocots. This order of necessity includes the
family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Liliaceae. The APG III system (2009) places this order in the monocot
clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ...
. In APG III, the family Luzuriagaceae is combined with the family Alstroemeriaceae and the family Petermanniaceae is recognized. Both the order Lililiales and the family Liliaceae have had a widely disputed history, with the circumscription varying greatly from one taxonomist to another. Previous members of this order, which at one stage included most monocots with conspicuous
tepals 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 ve ...
and lacking
starch Starch or amylum is a polymeric carbohydrate consisting of numerous glucose units joined by glycosidic bonds. This polysaccharide is produced by most green plants for energy storage. Worldwide, it is the most common carbohydrate in human diet ...
in the
endosperm The endosperm is a tissue produced inside the seeds of most of the flowering plants following double fertilization. It is triploid (meaning three chromosome sets per nucleus) in most species, which may be auxin-driven. It surrounds the Embryo#Pla ...
are now distributed over three orders, Liliales, Dioscoreales and Asparagales, using predominantly
molecular phylogenetics Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...
. The newly delimited Liliales is
monophyletic In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent co ...
, with ten families. Well known plants from the order include ''
Lilium ''Lilium'' ( ) is a genus of Herbaceous plant, herbaceous flowering plants growing from bulbs, all with large and often prominent flowers. Lilies are a group of flowering plants which are important in culture and literature in much of the world ...
'' (lily),
tulip Tulips are spring-blooming perennial herbaceous bulbiferous geophytes in the ''Tulipa'' genus. Their flowers are usually large, showy, and brightly coloured, generally red, orange, pink, yellow, or white. They often have a different colour ...
, the North American wildflower '' Trillium'', and greenbrier. Thus circumscribed, this order consists mostly of
herbaceous Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials. Definitions of "herb" and "herbaceous" The fourth edition of ...
plants, but lianas and
shrubs A shrub or bush is a small to medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple ...
also occur. They are mostly
perennial plant In horticulture, the term perennial (''wikt:per-#Prefix, per-'' + ''wikt:-ennial#Suffix, -ennial'', "through the year") is used to differentiate a plant from shorter-lived annual plant, annuals and biennial plant, biennials. It has thus been d ...
s, with food storage organs such as corms or
rhizome In botany and dendrology, a rhizome ( ) is a modified subterranean plant stem that sends out roots and Shoot (botany), shoots from its Node (botany), nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from ...
s. The family Corsiaceae is notable for being heterotrophic. The order has worldwide distribution. The larger families (with more than 100 species) are roughly confined to the
Northern Hemisphere The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in the Solar System, north is defined by humans as being in the same celestial sphere, celestial hemisphere relative to the invariable plane of the Solar ...
, or are distributed worldwide, centering on the north. On the other hand, the smaller families (with up to 10 species) are confined to the Southern Hemisphere, or sometimes just to
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
or
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...
. The total number of species in the order is now about 1768. As with any
herb Herbs are a widely distributed and widespread group of plants, excluding vegetables, with savory or aromatic properties that are used for flavoring and garnishing food, for medicinal purposes, or for fragrances. Culinary use typically distingu ...
aceous group, the
fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...
record of the Liliales is rather scarce. There are several species from the
Eocene The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes ...
, such as ''Petermanniopsis anglesaensis'' or ''Smilax'', but their identification is not definite. Another known fossil is ''Ripogonum scandens'' from the
Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...
. Due to the scarcity of data, it seems impossible to determine precisely the age and the initial distribution of the order. It is assumed that the Liliales originate from the Lower
Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...
, over 100 million years ago. Fossil aquatic plants from the
Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...
of northeastern Brazil and a new terrestrial species placed in the new genus '' Cratosmilax'' suggest that the first species have appeared around 120 million years ago when the continents formed Pangea, before dispersing as Asia, Africa and America. The initial diversification to the current families took place between 82 and 48 million years ago. The order consists of 10 families, 67 genera and about 1,768 species.


Description

The Liliales are a diverse order of predominantly
perennial In horticulture, the term perennial ('' per-'' + '' -ennial'', "through the year") is used to differentiate a plant from shorter-lived annuals and biennials. It has thus been defined as a plant that lives more than 2 years. The term is also ...
erect or twining
herbaceous Herbaceous plants are vascular plants that have no persistent woody stems above ground. This broad category of plants includes many perennials, and nearly all annuals and biennials. Definitions of "herb" and "herbaceous" The fourth edition of ...
and climbing plants. Climbers, such as the herbaceous '' Gloriosa'' (Colchicaceae) and '' Bomarea'' (Alstroemeriaceae), are common in the Americas in
temperate In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ran ...
and
tropical The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's ax ...
zones, while most species of the subtropical and tropical genus '' Smilax'' (Smilacaceae) are herbaceous or woody climbers and comprise much of the vegetation within the Liliales range. They also include woody
shrubs A shrub or bush is a small to medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple ...
, which have fleshy stems and underground storage or perennating organs, mainly bulbous geophytes, sometimes rhizomatous or cormous.
Leaves A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, ...
are elliptical and straplike with parallel venation or ovate with palmate veins and reticulate minor venation (Smilacaceae). In '' Alstroemeria'' and '' Bomarea'' (Alstroemeriaceae) the leaves are resupinate (twisted). The flowers are highly variable, ranging in size from the small green actinomorphic (radially symmetric) blooms of ''Smilax'' to the large showy ones found in ''
Lilium ''Lilium'' ( ) is a genus of Herbaceous plant, herbaceous flowering plants growing from bulbs, all with large and often prominent flowers. Lilies are a group of flowering plants which are important in culture and literature in much of the world ...
'', ''
Tulipa Tulips are spring-blooming perennial herbaceous bulbiferous geophytes in the ''Tulipa'' genus. Their flowers are usually large, showy, and brightly coloured, generally red, orange, pink, yellow, or white. They often have a different coloured ...
'' and '' Calochortus'' (Liliaceae) and ''
Lapageria ''Lapageria'' is a genus of flowering plants with only one known species, ''Lapageria rosea'', commonly known as Chilean bellflower or copihue (''copeewueh'', from Mapudungun ''kopiwe''). ''Lapageria rosea'' is endemic to Chile and it is the Flo ...
'' (Philesiaceae). Sepals and petals are undifferentiated from each other, and known as
tepals 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 ve ...
, forming a
perianth The perianth (perigonium, perigon or perigone in monocots) is the non-reproductive part of the flower. It is a structure that forms an envelope surrounding the sexual organs, consisting of the calyx (sepals) and the corolla (petals) or tepal ...
. They are usually large and pointed and may be variegated in '' Fritillaria'' (Liliaceae). Nectaries may be perigonal (at base of tepals) but not septal (on
ovaries The ovary () is a gonad in the female reproductive system that produces ova; when released, an ovum travels through the fallopian tube/oviduct into the uterus. There is an ovary on the left and the right side of the body. The ovaries are endocr ...
). Perigonal nectaries may be a simple secretory epidermal region at the tepal bases (''
Lapageria ''Lapageria'' is a genus of flowering plants with only one known species, ''Lapageria rosea'', commonly known as Chilean bellflower or copihue (''copeewueh'', from Mapudungun ''kopiwe''). ''Lapageria rosea'' is endemic to Chile and it is the Flo ...
'') or small, depressed regions fringed with hairs, often with glandular surface protuberances, at the bases of the inner tepals ('' Calochortus''), while in '' Tricyrtis'' the tepals become bulbous or spur-like at the base, forming a nectar-containing sac. Ovaries may be inferior or superior, the style often long and stigma capitate (pin headed). In a number of taxa there are three separate styles, particularly some Melanthiaceae ''s.l.'' (e.g. '' Helonias'', '' Trillium'', '' Veratrum'') and '' Chionographis''. The outer integument epidermis of the seed coat is cellular, and the phytomelanin pigment is lacking. The inner integument is also cellular and these features are plesiomorphic. The Liliales are characterised by ( synapomorphies) the presence of nectaries at the base of the tepals (perigonal nectaries) or
stamen The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament ...
filaments (''
Colchicum ''Colchicum'' ( or ) is a genus of perennial plant, perennial flowering plants containing around 160 species which grow from bulb-like corms. It is a member of the botanical family (biology), family Colchicaceae, and is native plant, native to ...
'', '' Androcymbium'') most taxa but the absence of septal nectaries, together with extrorse (outward opening) anthers. This distinguishes them from the septal nectaries and introrse anthers that are the features of most other monocots. Exceptions are some Melanthiaceae in which nectaries are absent or septal and anthers that are introrse (dehiscence directed inwards) in Campynemataceae, Colchicaceae, and some Alstroemeriaceae, Melanthiaceae, Philesiaceae, Ripogonaceae and Smilacaceae. Tepals are largely three-traced in net-veined taxa of Liliales (e.g. '' Clintonia'', '' Disporum''), distinguishing them from the single-traced Asparagales, and is associated with the presence of tepal nectaries, presumably to supply them. The presence of separate styles is also a distinguishing feature from Asparagales, where it is rare. Phytomelan is completely absent in Liliales seed coats, unlike Asparagales, which nearly all contain it.


Phytochemistry

The stems contain
fructan A fructan is a polymer of fructose molecules. Fructans with a short chain length are known as fructooligosaccharides. Fructans can be found in over 12% of the angiosperms including both monocots and dicotyledon, dicots such as agave, artichokes, a ...
s, the plants also contain chelidonic acid, saponins, while some species contain velamen. The
epicuticular wax Epicuticular wax is a waxy coating which covers the outer surface of the plant cuticle in land plants. It may form a whitish film or bloom on leaves, fruits and other plant organs. Chemically, it consists of hydrophobic organic compounds, mainly ...
is of the Convallaria type, consisting of parallel orientated platelets.


Genome

The order includes
taxa In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and ...
with some of the largest genomes among Angiosperms, particularly
Melanthiaceae Melanthiaceae, also called the bunchflower family, is a family (biology), family of flowering plant, flowering herbaceous perennial plants native to the Northern Hemisphere. Along with many other lilioid monocots, early authors considered member ...
, Alstroemeriaceae and Liliaceae.


Taxonomy

With 11 families, about 67
genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ...
and about 1,558
species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
, Liliales is a relatively small
angiosperm Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed within a fruit ...
order, but a large group within the monocotyledons.


History


Origins

The botanical authority for Liliales is given to Perleb (1826), who grouped eleven families ( Asparageae, Pontederiaceae, Asphodeleae, Coronariae,
Colchicaceae Colchicaceae is a family of flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; ...
, Dioscoreaceae, Hypoxideae, Amaryllideae, Haemodoraceae, Burmanniaceae, Irideae) into an order he called Liliaceae. In Perleb's system, he divided the vascular plants into seven classes, of which the Phanerogamicae or seed plants he called his class IV, or Ternariae. The latter, he divided into five orders (''ordo''), including the Liliaceae. A number of later
taxonomist In biology, taxonomy () is the science, scientific study of naming, defining (Circumscription (taxonomy), circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxon, taxa (si ...
s, such as Endlicher (1836) substitituted the term Coronarieae for this higher order, including six subordinate taxa. Endlicher divided the Cormophyta into five sections, of which Amphibrya contained eleven classes, including Coronarieae. The term Liliales was introduced by Lindley (1853), referring to these higher orders as alliances. Lindley included four families in this alliance. Lindley called the monocots class Endogenae, with eleven alliances including Liliales. Although Bentham (1877) restored Coronariae as one of seven Series making up the monocotyledons, it was replaced by Liliiflorae and then Liliales in subsequent publications (''see Table for history'').


Phyletic systems

Subsequent authors, now adopting a
phylogenetic In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as phylogenetic inference. It infers the relationship among organisms based on empirical dat ...
(phyletic) or
evolutionary Evolution is the change in the heritable characteristics of biological populations over successive generations. It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certa ...
approach over the natural method, did not follow Bentham's nomenclature.
Eichler Several people are named Eichler: * August W. Eichler (1839–1887), German botanist * Caroline Eichler (1808/9–1843), German inventor, first woman to be awarded a patent (for her leg prosthesis) * Eunice Eichler (1932–2017), New Zealand Salvat ...
(1886) used Liliiflorae for the higher order including Liliaceae, placing it as the first order (''Reihe'') in his class monocotyledons, as did Engler (1903), Lotsy (1911), and Wettstein in 1924, in class Monocotyledones, subdivision Angiospermae. Hutchinson (1973) restored Liliales for the higher rank, an approach that has been adopted by most major classification systems onwards, reserving Liliiflorae for higher ranks. These include Cronquist (1981), Dahlgren (1985), Takhtajan (1997) as well as Thorne and Reveal (2007). Hutchinson (1973) derived a more elaborate hierarchy, placing order Liliales as one of 14 in division Corolliferae, one of three divisions of
subphylum In zoological nomenclature, a subphylum is a taxonomic rank below the rank of phylum. The taxonomic rank of " subdivision" in fungi and plant taxonomy is equivalent to "subphylum" in zoological taxonomy. Some plant taxonomists have also used th ...
monocotyledons. Cronquist (1981) placed the order Liliales as one of two in subclass Liliidae, one of five in the class Liliopsida (monocotyledons) of division Magnoliophyta (angiosperms). Dahlgren (1985) made Liliales one of six orders in Superorder Liliiflorae, one of ten divisions of the monocots. Takhtajan (1997) had a more complex system of higher taxonomic ranks, placing Liliales as one of 15 orders within superorder Lilianae, one of four within subclass Liliidae. Liliidae in turn was one of four subclasses in class Liliopsida (monocots). In contrast Thorne and Reveal (2007) abandoned the use of monocotyledons as a distinct taxon, replacing it with 3 separate subclasses of Magnoliopsida (angiosperms), of which Liliidae consists of 3 superorders, placing Liliales in superorder Lilianae. In all these systems, Liliales (or Liliiflorae) were visualised as either a direct division of the monocots (or equivalent) or were placed in an intermediate division of the monocots, such as superorder Lilianae.


Molecular phylogenetic systems

The development of
molecular phylogenetic Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...
methods for determining taxonomic circumscription and
phylogeny A phylogenetic tree or phylogeny is a graphical representation which shows the evolutionary history between a set of species or Taxon, taxa during a specific time.Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, M ...
led to considerable revision of angiosperm classification, and establishment of Liliales as a
monophyletic In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent co ...
group. It was clear by 1996, that the most useful system to date, that of Dahlgren, required urgent revision. The new classification was formalised with the creation of the Angiosperm Phylogeny Group (APG) system (1998–2016), based on
monophyletic In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent co ...
clades In biology, a clade (), also known as a monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach to taxonomy ...
, which continued the use of Liliales as the name for the taxon. The Angiosperm Phylogeny Group APG system (1998) established a structure of monocot classification with ten orders. Notable was the separation of asparagids, as suggested by Dahlgren, into Asparagales, with other taxa placed in Dioscoreales, resulting in a much reduced order.


Phylogeny

The position of Liliales within the monocots (Lilianae) is shown in the following
cladogram A cladogram (from Greek language, Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an Phylogenetic tree, evolutionary tree because it does not s ...
. The monocot orders form three grades, the alismatid monocots, lilioid monocots and the commelinid monocots by order of branching, from early to late. These have alternatively been referred to as Alismatanae, Lilianae and Commelinanae. The alismatid monocots form the basal group, while the remaining grades (lilioid and commelinid monocots) have been referred to as the "core monocots". The relationship between the orders (with the exception of the two sister orders) is pectinate, that is diverging in succession from the line that leads to the commelinids. The lilioid monocot orders constitute a
paraphyletic Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In co ...
assemblage, that is groups with a common ancestor that do not include all direct descendants (in this case commelinids which are a
sister group In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and ...
to Asparagales); to form a clade, all the groups joined by thick lines would need to be included. In the cladogram the numbers indicate crown group (most recent common ancestor of the sampled species of the clade of interest) divergence times in mya (million years ago).


Biogeography and evolution

The crown group of Liliales has been dated to ca. 117  Myr (million years ago) in the
Early Cretaceous The Early Cretaceous (geochronology, geochronological name) or the Lower Cretaceous (chronostratigraphy, chronostratigraphic name) is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 143.1 ...
period of the
Mesozoic The Mesozoic Era is the Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Period (geology), Periods. It is characterized by the dominance of archosaurian r ...
era.


Subdivision

The circumscription of Liliales has varied greatly since Perleb's original construction with 11 families in 1826. Many of these families are now considered to be in Asparagales, with the remainder in commelinids and Dioscoreales, as shown in this table. The availability of molecular phylogenetic methods suggested four main lineages within Liliales, and seven families; # Liliaceae group: Liliaceae (including some former Uvulariaceae and Calochortaceae), and Smilacaceae (including Ripogonaceae and Philesiaceae) # Campynemataceae # Colchicaceae group: Colchicaceae (including Petermannia and Uvularia), Alstroemeriaceae and Luzuriaga # Melanthiaceae (including Trilliaceae) The first Angiosperm Phylogeny Group classification (APG I) in 1998 had the following circumscription, with 9 families, having separated Philesiaceae and Ripogonaceae from Smilacaceae: * order Liliales *: family Alstroemeriaceae *: family Campynemataceae *: family
Colchicaceae Colchicaceae is a family of flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; ...
*: family Liliaceae *: family Luzuriagaceae *: family
Melanthiaceae Melanthiaceae, also called the bunchflower family, is a family (biology), family of flowering plant, flowering herbaceous perennial plants native to the Northern Hemisphere. Along with many other lilioid monocots, early authors considered member ...
*: family Philesiaceae *: family Ripogonaceae *: family Smilacaceae The APG II system (2003) added Corsiaceae to the Liliales, while APG III (2009) added Petermanniaceae and merged Luzuriagaceae into Alstroemeriaceae. The subsequent revision of APG IV (2016) left this unchanged, with 10 families. The exact phylogenetic relationship between the families of Liliales has been subject to revision. This cladogram shows that of the Angiosperm Phylogeny Website (2020): The bulk of the Liliales species are found in the very diverse family Liliaceae (16 genera, 610 species). Of the remaining nine families, three are referred to as the vine families (Ripogonaceae, Philesiaceae and Smilacaceae) and form a cluster.


Families


Distribution and habitat

Widely distributed but most commonly found in
subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones immediately to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Ge ...
and
temperate In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ran ...
regions, especially herbaceous taxa in temperate regions of the
Northern Hemisphere The Northern Hemisphere is the half of Earth that is north of the equator. For other planets in the Solar System, north is defined by humans as being in the same celestial sphere, celestial hemisphere relative to the invariable plane of the Solar ...
, and subtropical regions of the Southern hemisphere, including vines. Since many species are cultivated they have been introduced in many regions and consequently worldwide, and a number have subsequently escaped and naturalised.


Uses

Liliales form important sources of food and pharmaceuticals as well as playing a significant role in
horticulture Horticulture (from ) is the art and science of growing fruits, vegetables, flowers, trees, shrubs and ornamental plants. Horticulture is commonly associated with the more professional and technical aspects of plant cultivation on a smaller and mo ...
and
floriculture Floriculture (from ) is the study of the efficient production of the plants that produce showy, colorful flowers and foliage for human enjoyment in human environments. It is a commercially successful branch of horticulture and agriculture found ...
as ornamental plants. Pharmaceutical products include
colchicine Colchicine is a medication used to prevent and treat gout, to treat familial Mediterranean fever and Behçet's disease, and to reduce the risk of myocardial infarction. The American College of Rheumatology recommends colchicine, nonstero ...
from ''
Colchicum ''Colchicum'' ( or ) is a genus of perennial plant, perennial flowering plants containing around 160 species which grow from bulb-like corms. It is a member of the botanical family (biology), family Colchicaceae, and is native plant, native to ...
'' and ''Gloriosa'' (Colchicaceae) and veratrine and related compounds from '' Veratrum'' (Melanthiaceae) and '' Zigadenus'' (Melanthiaceae).


Notes


References


Bibliography


Books and symposia

* * * * * * * *
Excerpts
;Taxonomic systems * *
''Additional excerpts''
* * , '
additional excerpts
'' *


Historical sources

* * * * * , see also Syllabus der Pflanzenfamilien * * * *


Chapters

* * , In * , In * * , in


Articles

* * * * * * * * * * * * ;APG * * * * *


Websites

* * * (''see also'' Angiosperm Phylogeny Website) * (''see also'' Angiosperm Phylogeny Website) *


Further reading


Books and symposia

*


Historical sources

*


Articles

* * * * * * *


Websites

* {{Authority control Angiosperm orders Extant Aptian first appearances