球果葶藶檢視原始碼討論檢視歷史
| 球果葶藶 |
|
中文學名:球果葶藶 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:葶藶組 |
球果葶藶（qiú guǒ tíng lì，學名：Draba glomerata）為十字花科葶藶屬下的一個種。多年生草本，花期6月末-7月。產自青海、新疆、四川、西藏。 [1]
球果葶藶形態特徵
多年生草本，高1-9厘米。莖被單毛、叉狀毛和近於星狀的分枝毛，毛灰白色。
基生葉橢圓形或長卵形，長0.6-1.8厘米，寬2-3毫米，頂端漸尖或鈍，基部縮窄，全緣或有1-2小鋸齒；莖生葉長卵形，無柄，全緣或有鋸齒，兩側不等。葉都密被單毛、叉狀毛、星狀毛或分枝毛。
總狀花序有花7-15朵，密集成圓頭狀，常有1-4 葉狀苞片及總苞；萼片橢圓形，背面密被單毛和叉狀毛；花瓣白色。
短角果長橢圓形，長3-6毫米，寬1.5-2毫米，無毛，呈頭狀聚生。花期6月末-7月。 [2]
Draba glomerata Royle, Illustr. Bot. Himal. 1: 71. 1839; O. E. Schulz in Engl. Pflanzenr. 89 (4. 105): 220. 1927.
Herbs perennial, (1-)2-8(-10) cm tall, densely cespitose, often scapose. Caudex slender, often many branched, ultimate branches terminated in rosettes, covered with leaf remains of previous years. Stems erect, simple, tomentose with subsessile stellate trichomes. Basal leaves rosulate; petiole absent, rarely to 4 mm, rarely ciliate; leaf blade obovate, oblong, or lanceolate, 2-8 × (0.7-)1-2 mm, densely tomentose with sessile or subsessile, very fine, 4-rayed stellate trichomes the rays of which with 1 or 2 lateral branches on each side, base attenuate to cuneate, margin entire, not ciliate, apex obtuse. Cauline leaves (0 or)1-3(-5), sessile; leaf blade ovate, oblong, or elliptic, 2-5 × 0.5-2 mm, pubescent as basal leaves, base cuneate to obtuse, margin entire or rarely with 1 or 2 minute teeth on each side, not ciliate, apex subobtuse. Racemes 3-10-flowered, ebracteate or rarely lowermost flower bracteate, basally slightly elongated, remainder often subumbellate in fruit; rachis straight. Fruiting pedicels 1-3(-4) mm, ascending, straight, tomentose all around with subsessile, stellate trichomes. Sepals oblong, 1-2 × 0.6-0.8 mm, erect, abaxially sparsely tomentose, base of lateral pair not saccate, margin narrowly membranous. Petals white, spatulate, 1.8-2.5(-3) × 0.8-1.2 mm, apex subemarginate. Filaments 1-1.5 mm; anthers ovate, ca. 0.2 mm. Ovules (6-)8-12 per ovary. Fruit ovate, rarely oblong-ovate, (2.5-)3-4(-5) × 1.5-2.5 mm, not inflated, latiseptate, not twisted; valves glabrous or rarely puberulent, obscurely veined, base obtuse, apex acute; style obsolete or 0.1-0.2(-0.4) mm. Seeds brown, ovate, 0.7-1 × 0.5-0.7 mm. Fl. Jun-Aug, fr. Jul-Oct.
球果葶藶生長環境
生長於海拔2900-5500米的山坡草地、河邊砂土地、高山沼澤地及礫石質草甸。
球果葶藶分布範圍
產自青海、新疆、四川、西藏。克什米爾地區、尼泊爾西部、帕米爾東部也有分布。模式標本采自喜馬拉雅山區。