带你了解北美红豆杉

带你了解北美红豆杉

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浙江省青田县曼地亚红豆杉专业合作社    编辑：项李斌

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American Yew (Taxus media):

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北美红豆杉

    2米高灌木，雌雄同体，较矮，通常有分枝且层叠。树皮淡白色，极薄。枝条分散向上。树叶长1-2.5cm，宽1-2.4mm，淡绿色，沿气孔大局部短少外表乳突，从暗绿色到黄绿色，叶子表皮细胞从横截面看比高或±等径要宽。种子有些扁平，4－5mm。x＝12

    Shrubs to 2 m, usually monoecious, low, diffusely branched, straggling, spreading to prostrate. Bark reddish, very thin. Branches spreading and ascending. Leaves 1-2.5cm×1-2.4mm, pale green abaxiallym, mostly without cuticular papillae along stomatal bands,dark green to yellow-green adaxially, epidermal cells as viewed in cross section of leaf wider than tall or ± isodiametric. Seed somewhat flattened, 4-5mm. x = 12. 中国苗木网,999miaomu.com

    Seeds maturing late summer-early fall. Understory shrub in rich forests (deciduous, mixed, or coniferous ), bogs, swamps, gorges, ravine slopes, and rocky banks; 0-1500 m. It is the alleged hybrid between Taxus baccata Linnaeus and Taxus cuspidata Siebold & Zuccarini and the first choice for taxol extraction which approved by FDA and common in cultivation nowadays. The taxol content of its 4-5 year-old needle is equivalent to the content of 70-80-year-old bark of natural yew. As a shrub, media yew also can adapt to various environments. And its developed root system and strong germination ability of lateral bud make itself especially suitable for the forestation of medicine. 999苗木网,www.999miaomu.com