封面植物简介--羽裂雪兔子

Introduction of the Plant Front Cover:Saussurea leucoma (Asteraceae)

羽裂雪兔子（Saussurea leucoma Diels）隶属菊科风毛菊属，为我国特有的多年生草本植物。植株高7～15cm。茎单生直立，被稠密的叶。茎中下部叶有柄，线状披针形，长3～5cm，宽0．5～2．5cm，羽状深裂，叶背灰白色，被蛛网状绒毛至绵毛；最上部叶无柄，线形，常反折，叶两面密被黄白色绵毛。头状花序多数，在膨大的茎顶密集成半球形，直径约4～6cm；总苞片3～4层。小花管状，蓝紫色。瘦果黑色，倒圆锥形；冠毛黑褐色，2层。花果期7～lO月。

Saussurea leucoma Diels is a perennial herb of Asteraceae,and endemic to China. Plants 7-15 cm tall, with erect stem solitary, hidden by dense leaves. Lower and middle leaves petiolate, blade narrowly elliptic, 3-5 cm x 0. 5 -2. 5 cm, pinnatisect, abaxially grayish white, arachnoid tomentose to lanate; Uppermost leaves sessile,linear,reflexed, both surfaces densely yellowish white lanate. Capitula numerous in a hemi- spheric synflorescence, 4- 6 cm in diam, involucre cylindric, 0.5 - 0.8 mm in diam. With phyllaries 3 - 4 layers;Corolla blackish purple. Achene black,obeonic,with pappus in 2 rows straw-colored,F1, and fr. Jul. -Oct. Distrib front cover species are seen today. ution. SW Sichuan,SE Xizang,NW Yunnan, in alpine scree slopes, a picture was photographed from Xianggelila County,Yunnan Pr sold to tourists in large amount as ＂Snow Lotus＂, such a large The species is vulnerable in status according to IUCN estimate ovince, Ch 200-5 300 m. The na. As plants of this plant （ca. 20 cm tall） is rarely criteria.