雅魯藏布虎耳草
雅魯藏布虎耳草 |
中文學名:雅魯藏布虎耳草 拉丁學名:Saxifraga yaluzangbuensis J. T. Pan 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:薔薇目 亞 目:虎耳草亞目 科:虎耳草科 亞 科:虎耳草亞科 族:虎耳草族 屬:虎耳草屬 亞 屬:山羊臭亞屬 組:舌形組 亞 組:垂頭亞組 系:雅魯藏布系 |
雅魯藏布虎耳草(yǎ lǔ zàng bù hǔ ěr cǎo,學名:Saxifraga yaluzangbuensis J. T. Pan)是虎耳草科的草本植物。葉近橢圓形至長圓形,花瓣為黃色。分布於中國西藏自治區,為中國特有種。 [1]
目錄
雅魯藏布虎耳草形態特徵
多年生草本,高3.5-12厘米,叢生。莖不分枝,被褐色短腺毛,葉腋部還具褐色捲曲長柔毛。
基生葉具長柄,葉片近橢圓形,長5-7毫米,寬2.5-2.7毫米,先端稍鈍,兩面和邊緣均具褐色腺毛,葉柄長6-9毫米,腹面無毛,背面和邊緣具褐色捲曲長腺毛;
莖生葉,下部者具長柄,中上部者其柄漸變短至近無,葉片長圓形,長8-8.5毫米,寬2-2.7毫米,先端稍鈍,兩面和邊緣均密生褐色腺毛,葉柄長2-5.5毫米,邊緣具褐色捲曲長腺毛。
花單生於莖頂,或聚傘花序具2花;花梗密被黑褐色腺毛;萼片在花期由直立變開展,卵形至狹卵形,長4.2-4.8毫米,寬2-2.6毫米,先端鈍或急尖,兩面和邊緣均具黑褐色腺毛, 5-7脈於先端不匯合至匯合;
花瓣黃色,狹長圓形、披針形至劍形,長9-13毫米,寬2.6-3毫米,先端鈍或急尖,基部具長1-1.8毫米之爪,腹面無毛或疏生腺毛,背面和邊緣密生腺毛(腺頭紅褐色),5-7脈,無痂體;
雄蕊長3.8-4毫米,花絲鑽形;子房近下位,長約3.6毫米,周圍具環狀花盤,花柱長約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.
雅魯藏布虎耳草生長環境
雅魯藏布虎耳草生於海拔4300-4800米的高山草甸。 [3]