馬塘葶藶檢視原始碼討論檢視歷史
| 馬塘葶藶 |
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中文學名:馬塘葶藶 拉丁學名:Draba Matangensis O. E. Schulz 二名法:Draba Matangensis 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:原始花被亞綱 目:罌粟目 亞 目:白花菜亞目 科:十字花科 族:葶藶族 屬:葶藶屬 組:多葉葶藶組 |
馬塘葶藶（學名：Draba matangensis），為十字花科葶藶屬下的一個植物種。
多年生草本，高10-25（30）厘米。生于山坡岩石上，海拔3600-5100米。 [1]
馬塘葶藶形態特徵
多年生草本，高10-25（30）厘米。根莖分枝，成匍匐狀，宿存鱗片狀殘葉，上部着生蓮座狀葉。
莖直立，被單毛、叉狀毛，葉片疏生。基生葉大，倒卵狀楔形或長橢圓形，長1-7厘米，寬6-9毫米，頂端微尖，基部縮窄成柄，長達3-5.5厘米，邊緣有細鋸齒，兩面被長單毛、叉狀毛；莖生葉長卵形，邊緣有細鋸齒，無柄，被有與基生葉相同的毛。
總狀花序有花15-25朵，下有苞片；小花梗長約1厘米，邊緣淡黃色，有毛；花瓣黃色，廣倒卵形，長5-6毫米，頂端微凹，基部縮窄成爪；花絲基部擴大，花葯橢圓形，長約0.5毫米；雌蕊瓶狀，子房有毛。短角果卵形或圓形，扁平，長3-5毫米，寬3-4毫米，頂端圓形，花柱長約1毫米，有單毛。
種子圓形或卵圓形，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.
馬塘葶藶生長環境
生長於海拔3600-5100米的山坡岩石上。