总苞葶苈

总苞葶苈

原图链接 来自植物智

中文学名:总苞葶苈 拉丁学名:Draba involucrata 界:植物界 门:被子植物门 Angiospermae 纲:双子叶植物纲 Dicotyledoneae 亚 纲:原始花被亚纲 Archichlamydeae 目:罂粟目 Rhoeadales 亚 目:白花菜亚目 Capparineae 科:十字花科 Cruciferae 族:葶苈族 Trib. Drabeae 属:葶苈属 Draba 分布区域:产青海、四川、 云南、西藏东部。

总苞葶苈（zǒng bāo tíng lì，学名：Draba involucrata），为十字花科葶苈属下的一个植物种，多年生丛生草本。产青海、四川、云南、西藏东部。

目录

总苞葶苈形态特征

根茎分枝密，下部覆盖条状披针形枯叶，禾草色，细长，上部密生莲座状叶。

花茎无叶，高0.5-2厘米，被单毛、叉状毛，毛灰白色。莲座状叶倒卵形，长3-12毫米，疏生单毛、叉状毛，近于星状的分枝毛，有时无毛，叶全缘或两边有细齿及单长毛，基部成楔形，渐窄成柄。

总状花序有花3-10朵，密集成伞房状；小花梗长3-6毫米；子房卵形；花柱长约0.5毫米。

原图链接 来自植物智

果实椭圆形或卵形，长4-5毫米，宽约2毫米，无毛。种子卵圆形。花期6月。

Draba involucrata (W. W. Smith) W. W. Smith in Not. Roy. Bot. Gard. Edinb. n. 55: 206. 1919; O. E. Schulz in Engl. Pflanzenr. 89 (4. 105): 112. 1927. ——D. alpina L. var. leiophylla Franch. in Bull. Soc. Bot. France 30: 401. 1886; id. Pl. Delav. 1: 59. 1889. ——D. alpina L. var. involucrata W. W. Smith, l. c. 8: 121. 1913.

Herbs perennial, 0.5-3 cm tall, densely cespitose, scapose. Caudex many branched, ultimate branches terminated in rosettes and covered with petiolar remains of previous years. Stems erect, simple, often densely tomentose with a mixture of subsessile, forked and 3- or 4-rayed stellate trichomes, very rarely glabrescent distally. Basal leaves rosulate, persistent; petiole 1-5(-8) mm, persistent, rarely ciliate with simple trichomes; leaf blade suborbicular or obovate, 2-5 × 1-4 mm, abaxially sparsely to densely tomentose with subsessile, forked and 3- or 4-rayed stellate trichomes with unbranched rays, adaxially glabrous or sparsely tomentose, base cuneate, margin entire, apex rounded or obtuse. Cauline leaves absent. Racemes 3-8-flowered, ebracteate, elongated in fruit. Fruiting pedicels 2-7(-10) mm, divaricate straight, tomentose all around, very rarely glabrescent. Sepals oblong, 1.2-2 × 0.6-1.2 mm, erect, abaxially sparsely pilose or glabrous, base of lateral pair not saccate, margin narrowly membranous. Petals yellow, obovate, 2.5-4(-4.5) × (1-)1.5-2.5(-3) mm, apex emarginate; claw absent, rarely to 1 mm. Filaments 1-1.6 mm; anthers ovate, ca. 0.2 mm. Ovules 8-16 per ovary. Fruit suborbicular to elliptic, 2-4.5(-6) × 2-3 mm, latiseptate, twisted or not; valves glabrous or rarely puberulent, not veined, base and apex obtuse; style 0.1-0.6(-1) mm. Seeds brown, ovate, 1-1.3 × 0.5-0.9 mm. Fl. Jun-Aug, fr. Aug-Sep.

总苞葶苈生长环境

生于悬岩上或山坡沟谷，海拔3300-5100米。

总苞葶苈分布范围

产青海、四川、云南、西藏东部。模式标本采自云南丽江。