疏花葶苈查看源代码讨论查看历史
| 疏花葶苈 |
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中文学名:疏花葶苈 拉丁学名:Draba remotiflora O. E. Schulz 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 |
疏花葶苈(shū huā tíng lì，学名 Draba remotiflora O. E. Schulz)为十字花科多年生草本植物，生于石隙间，海拔约4600米，中国特有，分布区域狭窄，分布地点少于5个，易危，产四川松潘县南部黄龙寺。 [1]
疏花葶苈形态特征
多年生草本，高5-10厘米。茎直立，外倾，被单毛、有柄叉状毛、星状毛。
莲座状基生叶宽倒卵形，长1-1.5厘米，宽5-7毫米，边缘近顶端有1-2锯齿，顶端稍钝，基部缩窄成柄；茎下部的叶倒卵状楔形，大小和基生叶相同，无柄，边缘有1-2锯齿，上部叶渐尖缩窄；叶具疏生单毛、有柄叉状毛和星状毛。
总状花序仅有花3-6朵，有苞片；小花梗长6-10毫米；花未见。按文献记载为：花大，萼片长约3毫米，长椭圆形或卵形，顶端圆形，背面被单毛、叉状毛；花瓣金黄色，宽倒卵形，顶端微凹，爪渐窄；
雄蕊长5-6.5毫米，花药长卵形，长约0.6毫米；子房卵形，花柱细。
短角果长卵形，长0.5-1.2厘米，宽约4毫米，有单毛、叉状毛；果梗长2-12毫米，下垂，花柱长2-3毫米。种子卵形。花期8月，很快即结实。 [2]
Draba remotiflora O. E. Schulz in Meddel. Goteborgs Bot. Tradgird 1: 165. 1924 et in Engl. Pflanzenr. 89 (4. 105): 186. 1927.
Herbs perennial, 5-15 cm tall. Caudex several branched, ultimate branches subfiliform, terminated in rosettes. Stems decumbent, simple, basally sparsely pubescent with stalked, forked trichomes, distally with crisped, appressed, sessile or short-stalked, forked or 3-branched trichomes. Basal leaves rosulate, persistent; petiolelike base 2-15 mm; leaf blade broadly obovate, 0.5-1.7 cm × 3-8 mm, abaxially sparsely pilose with a mixture of long-stalked, forked and minutely 3- or 4-rayed stellate trichomes, adaxially with predominantly long-stalked forked trichomes, base cuneate to attenuate, margin 1- or 2-toothed on each side, sometimes subtrilobed and with the terminal lobe largest, apex subacute. Cauline leaves 5-10, similar to basal leaves in shape and indumentum, uppermost bracts entire, oblong. Racemes 2-6-flowered, bracteate throughout, elongated considerably in fruit. Fruiting pedicels 0.5-1.5 cm, strongly recurved or uppermost ascending, sparsely pubescent all around with appressed, subsessile, forked and 3-branched trichomes. Sepals oblong or ovate, 3-3.5 × ca. 1.5 mm, spreading, abaxially pilose with simple trichomes, not saccate, margin membranous. Petals yellow, broadly obovate, 6-8 × 3-4 mm, spreading, apex emarginate; claw 2-3 mm. Filaments 3.5-5 mm, spreading; anthers oblong, 0.7-1 mm. Ovules 18-22 per ovary. Fruit suborbicular, ovate to oblong, 0.7-1.3 cm × 3-6 mm, pendulous, latiseptate, not twisted; valves puberulent with simple trichomes and fewer, forked trichomes, obscurely veined; style 2-3.5 mm. Seeds brown, ovate, 1.2-1.5 × 0.9-1.1 mm. Fl. and fr. Aug.
疏花葶苈生长环境
生长于海拔约4600米的石隙间。