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Yew
Yew is a common name given to various species of trees. It is most prominently given to any of various coniferous trees and shrubs in the genus '' Taxus'': * European yew or common yew (''Taxus baccata'') * Pacific yew or western yew ('' Taxus brevifolia'') * Canadian yew ('' Taxus canadensis'') * Chinese yew ('' Taxus chinensis'') * Japanese yew ('' Taxus cuspidata'') * Florida yew ('' Taxus floridana'') * Mexican yew ('' Taxus globosa'') * Sumatran yew ('' Taxus sumatrana'') * Himalayan yew ('' Taxus wallichiana'') * '' Taxus masonii'' (Eocene fossil yew) It is also used for any of various coniferous plants in the families Taxaceae and Cephalotaxaceae: * White-berry yew ('' Pseudotaxus chienii'') * New Caledonian yew or southern yew ('' Austrotaxus spicata'') * Catkin-yew (''Amentotaxus ''Amentotaxus'' is a genus of Pinophyta, conifers (catkin-yews) comprising five species, treated in either the Cephalotaxaceae, or in the Taxaceae when that family is considered in a broa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus Baccata
''Taxus baccata'' is a species of evergreen tree in the family (botany), family Taxaceae, native to Western Europe, Central Europe and Southern Europe, as well as Northwest Africa, and parts of Southwest Asia.Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins . It is the tree originally known as yew, though with other related trees becoming known, it may be referred to as common yew, European yew, or in North America English yew. It is a woodland tree in its native range, and is also grown as an ornamental tree, hedge or topiary. The plant is poisonous, with toxins that can be absorbed through inhalation, ingestion, and transpiration through the skin. Consuming any part of the tree, excluding the aril, can be deadly and the consumption of even a small amount of the foliage can result in death. Taxonomy and naming The word ''yew'' is from Old English ''īw, ēow'', ultimately from Proto-Indo-European ''*h₁eyHw-''. Possibly entered Proto-Germanic language, Germanic la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus
''Taxus'' is a genus of coniferous trees or shrubs known as yews in the family Taxaceae. Yews occur around the globe in temperate zones of the northern hemisphere, northernmost in Norway and southernmost in the South Celebes. Some populations exist in tropical highlands. The oldest known fossil species are from the Early Cretaceous. Morphology They are relatively slow-growing and can be very long-lived, and reach heights of , with trunk girth averaging . They have reddish bark, lanceolate, flat, dark-green leaves long and broad, arranged spirally on the stem, but with the leaf bases twisted to align the leaves in two flat rows either side of the stem. The male cones are globose, across, and shed their pollen in early spring. Yews are mostly dioecious, but occasional individuals can be variably monoecious, or change sex with time. The seed cones are highly modified, each cone containing a single seed long partly surrounded by a modified scale which develops into a soft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus Brevifolia
''Taxus brevifolia'', the Pacific yew or western yew, is a species of tree in the yew family Taxaceae native to the Pacific Northwest of North America. It is a small evergreen conifer, thriving in moisture and otherwise tending to take the form of a shrub. Description A small evergreen conifer (sometimes appearing as a shrub), the Pacific yew grows to tall and with a trunk up to in diameter, rarely more. In some instances, trees with heights in excess of occur in parks and other protected areas, quite often in gullies. The tree is extremely slow growing, and has a habit of rotting from the inside, creating hollow forms. This makes it difficult and sometimes impossible to make accurate ring counts to determine a specimen's true age. Often damaged by succession of the forest, it usually ends up in a squat, multiple-leader form, able to grow new sprouts from decapitated stumps. In its shrub form, sometimes called "yew brush", it can reproduce vegetatively via layering. It has th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus Cuspidata
''Taxus cuspidata'', the Japanese yew or spreading yew, is a member of the genus ''Taxus'', native to Japan, Korea, northeast China and the extreme southeast of Russia. Names In Japan, the tree is known as ''ichi'i'' (一位), meaning "first rank". This is because first rank courtiers carried '' shaku'' scepters made of yew. Other Japanese names include ''jakunoki'', ''araragi'', and ''onko''. In the Ainu language, it is called ''rarmani''. In China, it is called ''dongbei hongdoushan'' (東北紅豆杉 "northeastern red bean fir"), ''zishan'' (紫杉 "purple fir"), or ''chi bo song'' (赤柏松 "red cypress-pine"). Description It is an evergreen tree or large shrub growing to 10–18 m tall, with a trunk up to 60 cm diameter. The leaves are lanceolate, flat, dark green, 1–3 cm long and 2–3 mm broad, arranged spirally on the stem, but with the leaf bases twisted to align the leaves in two flattish rows either side of the stem except on erect leading sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus Floridana
''Taxus floridana'', the Florida yew, is a species of yew, endemic to a small area of the Apalachicola River. This species has a restricted extent of occurrence (EOO) of 24km along the Apalachicola River and resides in the mesophytic forests of northern Florida at altitudes of 15–40 m. It is listed as critically endangeredFlora of North America''Taxus floridana''/ref> and is protected in reserves at the Torreya State Park and at the Nature Conservancy's Apalachicola Bluffs and Ravines Preserve. The Florida yew has legal protection under the United States and Florida Endangered Species laws. This species is considered endangered because of how rare it is and its limited range. Description It is an evergreen coniferous shrub or small tree growing to 6 m (rarely 10 m) tall, with a trunk up to 38 cm diameter. The bark is thin, scaly purple-brown, and the branches are irregularly orientated. The shoots are green at first, becoming brown after three or four years. The le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxaceae Taxonomic Diagram 2
Taxaceae (), commonly called the yew family, is a coniferous family which includes six extant and two extinct genera, and about 30 species of plants, or in older interpretations three genera and 7 to 12 species. Description They are many-branched, small trees and shrubs. The leaves are evergreen, spirally arranged, often twisted at the base to appear 2-ranked. They are linear to lanceolate, and have pale green or white stomatal bands on the undersides. The plants are dioecious, or rarely monoecious. The catkin like male cones are long, and shed pollen in the early spring. They are sometimes externally only slightly differentiated from the branches. The fertile bracts have 2-8 pollen sacs. The female 'cones' are highly reduced. Only the upper or uppermost bracts are fertile and bear one or rarely two seeds. The ovule usually exceeds the scale, although ovules are sometimes rarely enclosed by it. They may be found on the ends of branches or on the branches. They may grow singly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxaceae
Taxaceae (), commonly called the yew family, is a coniferous family (biology), family which includes six Extant taxon, extant and two extinct genera, and about 30 species of plants, or in older interpretations three genera and 7 to 12 species. Description They are many-branched, small trees and shrubs. The leaves are evergreen, spirally arranged, often twisted at the base to appear 2-ranked. They are linear to lanceolate, and have pale green or white stomatal bands on the undersides. The plants are Plant sexuality, dioecious, or rarely Plant sexuality, monoecious. The catkin like male cones are long, and shed pollen in the early spring. They are sometimes externally only slightly differentiated from the branches. The fertile bracts have 2-8 pollen sacs. The female 'cones' are highly reduced. Only the upper or uppermost bracts are fertile and bear one or rarely two seeds. The ovule usually exceeds the scale, although ovules are sometimes rarely enclosed by it. They may be foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus Canadensis
''Taxus canadensis'', the Canada yew or Canadian yew, is a conifer native to central and eastern North America, thriving in swampy woods, ravines, riverbanks and on lake shores. Locally called simply as "yew", this species is also referred to as American yew or ground-hemlock. Most of its range is well north of the Ohio River. It is, however, found as a rare ice age relict in some coves of the Appalachian Mountains. The southernmost colonies are known from Ashe and Watauga Counties in North Carolina. Description and ecology It is usually a sprawling shrub, rarely exceeding 2.5 m tall. It sometimes forms strong upright central leaders, but these cannot be formed from spreading branches, only from the original leader of the seedling plant. The shrub has thin scaly brown bark. The leaves ( needles) are lanceolate, flat, dark green, long and broad, arranged in two flat rows either side of the branch. The seed cones are highly modified, each cone containing a single seed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxus Chinensis
''Taxus chinensis'' is a species of yew. It is commonly called the Chinese yew, though this term also refers to '' Taxus celebica'' or '' Taxus sumatrana''. The species was first described by Alfred Rehder in 1919 in the Journal of the Arnold Arboretum. Before that, the tree was considered a variety of ''Taxus baccata ''Taxus baccata'' is a species of evergreen tree in the family (botany), family Taxaceae, native to Western Europe, Central Europe and Southern Europe, as well as Northwest Africa, and parts of Southwest Asia.Rushforth, K. (1999). ''Trees of Bri ...'', ''T. baccata'' var. ''sinensis''. This plant is used to produce medicines for cancer treatment, including Paclitaxel and Taxifolin (found in ''Taxus chinensis var. mairei)''. It can also be used in many other ways and is protected in various ways under Chinese and international law. This protection is in place due to the species' importance to cancer treatment, and its susceptibility to anthropomorphic distu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austrotaxus
''Austrotaxus spicata'', the New Caledonia yew or southern yew, is a species of yew, the sole species in the genus ''Austrotaxus''. It is related to the other yews in the genera ''Taxus'' and '' Pseudotaxus''. It is endemic to New Caledonia, occurring in the central and northern parts of the island at 300-1,350 m altitude. It is a dioecious coniferous shrub or small tree, reaching 5–20 m (rarely 25 m) tall with reddish bark. The leaves are lanceolate, flat, 8–12 cm long (up to 17 cm on young plants) and 4 mm broad, dark green above, with two paler green stomatal bands below; they are arranged spirally on the stem. The seed cones are drupe-like, 20–25 mm long, with a fleshy aril almost completely surrounding the single seed In botany, a seed is a plant structure containing an embryo and stored nutrients in a protective coat called a ''testa''. More generally, the term "seed" means anything that can be Sowing, sown, which may include seed and husk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saxegothaea
''Saxegothaea'' is a genus comprising a single species, ''Saxegothaea conspicua''. It is a conifer in the podocarp family Podocarpaceae, native to southern South America. It grows in Chile and Argentina from 35° to 46° South latitude; in its northernmost natural distribution it grows between 800 and 1000 (2600–3300 ft) m above sea level and in the south it lives at sea level. The species is most often known by its genus name, or sometimes as female maniu (a translation of its name in Spanish) and Prince Albert's yew; in South America it is known as mañío hembra or maniú hembra. The genus name of ''Saxegothaea'' is in honour of Franz August Carl Albert Emanuel von Sachsen-Coburg und Gotha (1819–1861), who was the consort of Queen Victoria from their marriage on 10 February 1840 until his death in 1861. Lindley wrote "This remarkable plant, to which His Royal Highness Prince Albert has been pleased to permit one of his titles to be given, and which will probably rank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
