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Thorn (botany)
In plant morphology, thorns, spines, and prickles, and in general spinose structures (sometimes called ''spinose teeth'' or ''spinose apical processes''), are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally serve the same function: physically defending plants against herbivory. Description In common language, the terms are used more or less interchangeably, but in botanical terms, thorns are derived from shoots (so that they may or may not be branched, they may or may not have leaves, and they may or may not arise from a bud),Simpson, M. G. 2010. "Plant Morphology". In: ''Plant Systematics, 2nd. edition''. Elsevier Academic Press. Chapter 9.Judd, Campbell, Kellogg, Stevens, Donoghue. 2007. "Structural and Biochemical Characters". In: ''Plant Systematics, a phylogenetic approach, third edition''. Chapter 4. spines are derived from leaves (either the entire leaf or some part of the leaf that has vascular bundles inside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thorns On A Blackberry Branch In Norrkila
Thorn(s) or The Thorn(s) may refer to: Botany * Thorns, spines, and prickles, sharp structures on plants * '' Crataegus monogyna'', or common hawthorn, a plant species Comics and literature * Rose and Thorn, the two personalities of two DC Comics characters * Thorn (Marvel Comics), a fictional character from Marvel Comics * Thornn, two fictional characters from Marvel Comics * Thorn (''Inheritance''), a dragon from the ''Inheritance cycle'' * ''Thorns'' (novel), a 1967 science fiction novel by Robert Silverberg * ''Thorn'', a 1982–1986 comic strip by Jeff Smith * Thorn Harvestar, a main character in Jeff Smith's ''Bone'' series * "The Thorn", a poem by William Wordsworth in '' Lyrical Ballads'', 1798 Companies, organisations and teams * Thorn (organization), an anti-human-trafficking organization * Thorn Electrical Industries, an electrical engineering business * Thorn EMI, a major British company involved in consumer electronics, music, defence and retail * Thorn L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glochid
Glochids or glochidia (: "glochidium") are hair-like spines or short prickles, generally barbed, found on the areoles of Cactus, cacti in the sub-family ''Opuntioideae''. Cactus glochids easily detach from the plant and lodge in the skin, causing irritation upon contact. The tufts of glochids in the areoles nearly cover the stem surfaces of some cactus species, each tuft containing hundreds of glochids; this may be in addition to, or instead of, the larger, more conspicuous cactus Spine (botany), spines, which do not readily detach and are not generally barbed. Mechanical irritant dermatitis Reaction to the glochidia Most cacti possess spines, some large enough to cause serious wounds. Glochids however, though smaller, commonly induce more troublesome, more persistent, dermatological manifestations in humans. Though minute, glochids commonly are barbed and once they have penetrated the skin barbed glochids are practically impossible to dislodge without leaving scraps of fore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carissa Bispinosa
''Carissa bispinosa'' grows as a shrub or small tree up to tall. Its fragrant flowers feature a white corolla. The fruit is red when ripe. Its habitat is woodland and forest from to elevation. Vernacular names for the plant include forest num-num and Y-thorned carissa. ''Carissa bispinosa'' is native an area from Uganda to South Africa. References External links PlantZAfrica.comImages on iSpot* bispinosa Flora of East Tropical Africa Flora of South Tropical Africa Flora of Southern Africa Plants described in 1767 {{Apocynaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnosporia
''Gymnosporia'' is an Old World genus of plants, that comprise suffrutices, shrubs and trees. It was formerly considered congeneric with '' Maytenus'', but more recent investigations separated it based on the presence of achyblasts (truncated branchlets) and spines, alternate leaves or fascicles of leaves, an inflorescence that forms a dichasium, mostly unisexual flowers, and fruit forming a dehiscent capsule, with an aril on the seed. It is dioecious, with male and female flowers on separate plants. Range The genus occurs in all of Africa, Madagascar and adjacent islands, southern Spain, the Middle East, Afghanistan, Pakistan, India, Sri Lanka, Thailand, Vietnam, southern China, Taiwan, the Ryukyu Islands, Malesia, Micronesia, and in Queensland, Australia. In the Afrotropical realm The Afrotropical realm is one of the Earth's eight biogeographic realms. It includes Sub-Saharan Africa, the southern Arabian Peninsula, the island of Madagascar, and the islands of the weste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Citrus
''Citrus'' is a genus of flowering trees and shrubs in the family Rutaceae. Plants in the genus produce citrus fruits, including important crops such as oranges, mandarins, lemons, grapefruits, pomelos, and limes. ''Citrus'' is native to South Asia, East Asia, Southeast Asia, Melanesia, and Australia. Indigenous people in these areas have used and domesticated various species since ancient times. Its cultivation first spread into Micronesia and Polynesia through the Austronesian expansion (–1500 BCE). Later, it was spread to the Middle East and the Mediterranean () via the incense trade route, and from Europe to the Americas. Renowned for their highly fragrant aromas and complex flavor, citrus are among the most popular fruits in cultivation. With a propensity to hybridize between species, making their taxonomy complicated, there are numerous varieties encompassing a wide range of appearance and fruit flavors. Evolution Evolutionary history The large cit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Stem
A stem is one of two main structural axes of a vascular plant, the other being the root. It supports leaf, leaves, flowers and fruits, transports water and dissolved substances between the roots and the shoots in the xylem and phloem, engages in photosynthesis, stores nutrients, and produces new living tissue. The stem can also be called the culm, halm, haulm, stalk, or thyrsus. The stem is normally divided into nodes and internodes: * The nodes are the points of attachment for leaves and can hold one or more leaves. There are sometimes axillary buds between the stem and leaf which can grow into branches (with leaf, leaves, conifer cones, or inflorescence, flowers). Adventitious roots (e.g. brace roots) may also be produced from the nodes. Vines may produce tendrils from nodes. * The internodes distance one node from another. The term "Shoot (botany), shoots" is often confused with "stems"; "shoots" generally refers to new fresh plant growth, including both stems and other str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf Morphology Apical Process Spinose-pungent
A leaf (: leaves) is a principal appendage of the plant stem, 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, flower, and fruit collectively form the Shoot (botany), shoot system. In most leaves, the primary Photosynthesis, photosynthetic Tissue (biology), tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf, but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. The leaf is an integral part of the stem system, and most leaves are flattened and have distinct upper (Glossary of botanical terms#adaxial, adaxial) and lower (Glossary of botanical terms#abaxial, abaxial) surfaces that differ in color, Trichome, hairiness, the number of stomata (pores that intake and output gases), the amount and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stem Morphology Type Areole
Stem or STEM most commonly refers to: * Plant stem, a structural axis of a vascular plant * Stem group * Science, technology, engineering, and mathematics Stem or STEM can also refer to: Language and writing * Word stem, part of a word responsible for its lexical meaning ** Stemming, a process in natural language processing * Stem (music), in music notation, the vertical lines directly connected to the note head * Stem (typography), the main vertical stroke of a letter * Stem, the opening of a multiple choice question Music and audio * Stem (audio), a collection of audio sources mixed together to be dealt with downstream as one unit * Stem (music), a part of a written musical note * Stem mixing and mastering, a method of mixing audio material * The Stems, an Australian garage punk band * "Stem" (DJ Shadow song), 1996 * "Stem" (Ringo Sheena song), 2003 * "Stem", a song by Hayden from the 1995 album '' Everything I Long For'' * "Stem", a song by Static-X from the 1999 albu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rose
A rose is either a woody perennial plant, perennial flowering plant of the genus ''Rosa'' (), in the family Rosaceae (), or the flower it bears. There are over three hundred Rose species, species and Garden roses, tens of thousands of cultivars. They form a group of plants that can be erect shrubs, climbing, or trailing, with stems that are often armed with sharp Thorns, spines, and prickles, prickles. Their flowers vary in size and shape and are usually large and showy, in colours ranging from white through pinks, reds, oranges and yellows. Most species are native to Asia, with smaller numbers native to Europe, North America, and Northwest Africa. Species, cultivars and hybrid (biology), hybrids are all widely grown for their beauty and often are fragrant. Roses have acquired cultural significance in many societies. Rose plants range in size from compact, miniature roses to climbers that can reach seven meters in height. Different species hybridize easily, and this has been use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
