梅花草葉虎耳草
梅花草葉虎耳草 |
中文學名:梅花草葉虎耳草 拉丁學名:Saxifraga parnassifolia D. Don 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:山羊臭組 亞 組:唐古拉亞組 系:小泡系 |
梅花草葉虎耳草(méi huā cǎo yè hǔ ěr cǎo,學名:Saxifraga parnassifolia)為虎耳草科虎耳草屬下的一個種。產於我國西藏自治區(聶拉木)。 [1]
目錄
梅花草葉虎耳草形態特徵
多年生草本,叢生,高11.5-24厘米。莖不分枝,密被褐色捲曲長腺毛。
基生葉具長柄,葉片心狀卵形,長1.5-4厘米,寬1.3-3厘米,先端急尖,基部心形,兩面和邊緣均具捲曲長柔毛(有的具腺頭),葉柄長1.25-2.7厘米,具捲曲腺柔毛;
莖生葉6-7枚,向上漸變小,卵形至心形,長9-3.5厘米,寬0.45-2.3厘米,先端鈍或急尖,基部心形,無柄且半抱莖,下部者兩面和邊緣均具捲曲長腺毛,最上部者兩面被褐色短腺毛,邊緣具長、短兩種腺毛。
多歧聚傘花序長2-2.5厘米,具6-11花;花梗被短腺毛;萼片在花期直立至開展,卵形至闊卵形,長3-4毫米,寬1.5-2.9毫米,腹面上部、背面和邊緣均具褐色短腺毛, 5-7脈於先端匯合成1疣點;
花瓣黃色,倒卵形至闊卵形,長5-7.9毫米,寬3.5-4毫米,先端鈍,基部狹縮成長0.6-1.7毫米之爪,5-7脈,具隆起之近柱狀4-6痂體;雄蕊長2.5-4毫米,花絲鑽形;
子房近上位,卵球形,長1.6-2.5毫米,花柱2,長1-2毫米。花期7-9月。 [2]
Saxifraga diversifolia Wallich ex Seringe var. parnassiifolia (D. Don) Seringe; S. parnassiifolia var. obscuricallosa J. T. Pan.
Herbs perennial, cespitose, 11.5-24 cm tall. Stem branched, densely brown crisped glandular villous. Basal leaves with petiole 1.3-2.7 cm, crisped glandular villous; leaf blade cordate-ovate, 1.5-4 × 1.3-3 cm, crisped villous on both surfaces and at margin or glabrous adaxially, base cordate, apex acute. Cauline leaves 6 or 7, sessile, ovate to cordate, 0.9-3.5 × 0.5-2.3 cm, base cordate, semiamplexicaul, apex obtuse or acute; proximal leaves glandular villous on both surfaces and at margin or glabrous adaxially; distal leaves shortly glandular hairy on both surfaces, margin shortly glandular hairy and glandular villous. Pleiochasium 2-2.5 cm, 6-11-flowered; pedicels shortly glandular hairy. Sepals erect to spreading, ovate to broadly so, 3-4 × 1.5-2.9 mm, shortly brown glandular hairy abaxially, adaxially distally, and at margin and apex, veins 5-7, confluent into a verruca at apex. Petals yellow, obovate to broadly ovate, 5-7.9 × 3.5-4 mm, subcolumnar 4-6-callose, not or indistinctly 2- or 3-callose, 5-7-veined, base contracted into a claw 0.6-1.7 mm, apex obtuse. Stamens 2.5-4 mm. Ovary subsuperior, ovoid, 1.6-2.5 mm; styles 1-2 mm. Fl. Jul-Sep. 2n = 16.
Abies forest margins, slopes; 2700-4000 m. S Xizang (Nyalam Xian, Zayü Xian) [Bhutan, India, Nepal, Sikkim].
Saxifraga parnassiifolia var. obscuricallosa, which was accepted in FRPS, cannot be distinguished reliably because of intermediates.
梅花草葉虎耳草生長環境
生長於海拔2700-4000米的山坡。 [3]
梅花草葉虎耳草分布範圍
梅花草葉虎耳草變種
隱痂虎耳草(變種)(西藏植物志) 圖版35: 20-26
Saxifraga parnassifolia var. obscuricallosa J. T. Pan in C. Y. Wu, Fl. Xizang. 2: 478. 1985.
此變種與原變種之區別在於其下部莖生葉和基生葉腹面無毛;花瓣無痂體或具極不明顯之2-3小痂體(而非隆起之柱狀痂體)。花期7-9月。
產我國西藏(察隅)。生於海拔4000米左右的冷杉林緣。