马塘葶苈
| 马塘葶苈 |
|
中文学名:马塘葶苈 拉丁学名:Draba Matangensis O. E. Schulz 二名法:Draba Matangensis 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 目:罂粟目 亚 目:白花菜亚目 科:十字花科 族:葶苈族 属:葶苈属 组:多叶葶苈组 |
马塘葶苈（学名：Draba matangensis），为十字花科葶苈属下的一个植物种。
多年生草本，高10-25（30）厘米。生于山坡岩石上，海拔3600-5100米。 [1]
目录
马塘葶苈形态特征
多年生草本，高10-25（30）厘米。根茎分枝，成匍匐状，宿存鳞片状残叶，上部着生莲座状叶。
茎直立，被单毛、叉状毛，叶片疏生。基生叶大，倒卵状楔形或长椭圆形，长1-7厘米，宽6-9毫米，顶端微尖，基部缩窄成柄，长达3-5.5厘米，边缘有细锯齿，两面被长单毛、叉状毛；茎生叶长卵形，边缘有细锯齿，无柄，被有与基生叶相同的毛。
总状花序有花15-25朵，下有苞片；小花梗长约1厘米，边缘淡黄色，有毛；花瓣黄色，广倒卵形，长5-6毫米，顶端微凹，基部缩窄成爪；花丝基部扩大，花药椭圆形，长约0.5毫米；雌蕊瓶状，子房有毛。短角果卵形或圆形，扁平，长3-5毫米，宽3-4毫米，顶端圆形，花柱长约1毫米，有单毛。
种子圆形或卵圆形，深褐色。花果期6-9月。
Herbs perennial, 10-35 cm tall, without stellate trichomes. Caudex few branched, ultimate branches terminated in rosettes. Stems erect, simple, densely pubescent with a mixture of simple and short-stalked trichomes crisped and soft on distal parts of plant. Basal leaves rosulate, persistent; petiole 0.5-5 cm; leaf blade oblong, elliptic to oblanceolate, 0.7-4 cm × 5-12 mm, moderately pilose on both surfaces with simple and short-stalked forked trichomes, base cuneate to attenuate, margin entire or denticulate, apex acute. Cauline leaves 4-14, sessile; leaf blade narrowly oblong, elliptic, or lanceolate, 1-3 cm × 4-7 mm, pubescent as basal leaves, base cuneate, not auriculate, margin dentate or denticulate, apex acute. Racemes 15-32-flowered, bracteate basally, elongated considerably in fruit. Fruiting pedicels 0.5-2.5(-3.2) cm, divaricate to ascending, straight or slightly curved, glabrous adaxially, pubescent abaxially with soft, simple and forked trichomes. Sepals oblong, 2-3 × 1-1.7 mm, ascending, abaxially pilose with simple trichomes, base of lateral pair not saccate, margin membranous. Petals yellow, obovate, 5.5-7 × 3-4 mm, apex emarginate; claw ca. 1 mm. Filaments 2-3.5 mm; anthers oblong, 0.6-1 mm. Ovules 4-8 per ovary. Fruit ovate to suborbicular, 3-8 × 3-4 mm, latiseptate, sometimes slightly twisted; valves puberulent with simple trichomes, obscurely to distinctly veined; style 0.4-1 mm. Seeds brown, ovate, 1.3-1.6 × 0.9-1.3 mm. Fl. Jun-Jul, fr. Jul-Sep.
马塘葶苈生长环境
生长于海拔3600-5100米的山坡岩石上。