球果葶苈
| 球果葶苈 |
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中文学名:球果葶苈 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:葶苈组 |
球果葶苈（qiú guǒ tíng lì，学名：Draba glomerata）为十字花科葶苈属下的一个种。多年生草本，花期6月末-7月。产自青海、新疆、四川、西藏。 [1]
目录
球果葶苈形态特征
多年生草本，高1-9厘米。茎被单毛、叉状毛和近于星状的分枝毛，毛灰白色。
基生叶椭圆形或长卵形，长0.6-1.8厘米，宽2-3毫米，顶端渐尖或钝，基部缩窄，全缘或有1-2小锯齿；茎生叶长卵形，无柄，全缘或有锯齿，两侧不等。叶都密被单毛、叉状毛、星状毛或分枝毛。
总状花序有花7-15朵，密集成圆头状，常有1-4 叶状苞片及总苞；萼片椭圆形，背面密被单毛和叉状毛；花瓣白色。
短角果长椭圆形，长3-6毫米，宽1.5-2毫米，无毛，呈头状聚生。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.
球果葶苈生长环境
生长于海拔2900-5500米的山坡草地、河边砂土地、高山沼泽地及砾石质草甸。