雅鲁藏布虎耳草查看源代码讨论查看历史
雅鲁藏布虎耳草 |
中文学名:雅鲁藏布虎耳草 拉丁学名:Saxifraga yaluzangbuensis J. T. Pan 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:蔷薇目 亚 目:虎耳草亚目 科:虎耳草科 亚 科:虎耳草亚科 族:虎耳草族 属:虎耳草属 亚 属:山羊臭亚属 组:舌形组 亚 组:垂头亚组 系:雅鲁藏布系 |
雅鲁藏布虎耳草(yǎ lǔ zàng bù hǔ ěr cǎo,学名:Saxifraga yaluzangbuensis J. T. Pan)是虎耳草科的草本植物。叶近椭圆形至长圆形,花瓣为黄色。分布于中国西藏自治区,为中国特有种。 [1]
雅鲁藏布虎耳草形态特征
多年生草本,高3.5-12厘米,丛生。茎不分枝,被褐色短腺毛,叶腋部还具褐色卷曲长柔毛。
基生叶具长柄,叶片近椭圆形,长5-7毫米,宽2.5-2.7毫米,先端稍钝,两面和边缘均具褐色腺毛,叶柄长6-9毫米,腹面无毛,背面和边缘具褐色卷曲长腺毛;
茎生叶,下部者具长柄,中上部者其柄渐变短至近无,叶片长圆形,长8-8.5毫米,宽2-2.7毫米,先端稍钝,两面和边缘均密生褐色腺毛,叶柄长2-5.5毫米,边缘具褐色卷曲长腺毛。
花单生于茎顶,或聚伞花序具2花;花梗密被黑褐色腺毛;萼片在花期由直立变开展,卵形至狭卵形,长4.2-4.8毫米,宽2-2.6毫米,先端钝或急尖,两面和边缘均具黑褐色腺毛, 5-7脉于先端不汇合至汇合;
花瓣黄色,狭长圆形、披针形至剑形,长9-13毫米,宽2.6-3毫米,先端钝或急尖,基部具长1-1.8毫米之爪,腹面无毛或疏生腺毛,背面和边缘密生腺毛(腺头红褐色),5-7脉,无痂体;
雄蕊长3.8-4毫米,花丝钻形;子房近下位,长约3.6毫米,周围具环状花盘,花柱长约2.5毫米。花期8-9月。 [2]
Herbs perennial, cespitose, 3.5-12 cm tall. Stem simple, brown glandular hairy and brown crisped villous at leaf axils. Basal leaves with petiole 6-9 mm, abaxially and marginally brown crisped glandular villous; leaf blade subelliptic, 5-7 × 2.5-2.7 mm, brown glandular hairy, apex subobtuse. Cauline leaves with petiole 2-5.5 mm, gradually shorter to nearly absent distally on stem, margin brown crisped glandular villous; leaf blade oblong, 8-8.5 × 2-2.7 mm, densely brown glandular hairy, apex subobtuse. Flower solitary or cyme 2- or 3-flowered; pedicels densely dark brown glandular hairy. Sepals erect, then spreading, ovate to narrowly so, 4.2-4.8 × 2-2.6 mm, dark brown glandular hairy, veins 5-7, confluent or not at apex, apex obtuse or acute. Petals yellow, narrowly oblong or lanceolate to ensiform, 0.9-1.3 cm × 2.6-3 mm, abaxially and marginally densely glandular hairy, adaxially glabrous or sparsely glandular hairy, not callose, 5-7-veined, base with a claw 1-1.8 mm, apex obtuse or acute. Stamens 3.8-4 mm. Ovary subinferior, ca. 3.6 mm, with an annular nectary disc; styles ca. 2.5 mm. Fl. Aug-Sep.
- Alpine meadows; 4300-4800 m. E and S Xizang (Biru Xian, Nang Xian, Yadong Xian).
The spelling of the specific epithet follows the protologue; in FRPS, it was given as "Saxifraga yaluzangbuensis." The species differs from the closely related (but Himalayan) S. viscidula J. D. Hooker & Thomson in its glandular hairy petals.
雅鲁藏布虎耳草生长环境
雅鲁藏布虎耳草生于海拔4300-4800米的高山草甸。 [3]