星毛紫金牛
星毛紫金牛 |
中文學名:星毛紫金牛 二名法:Ardisia stellata 界:植物界 門:被子植物門 綱:雙子葉植物綱 亞 綱:合瓣花亞綱 目:報春花目 科:紫金牛科 亞 科:紫金牛亞科 屬:紫金牛屬 亞 屬:腋序組 生 境:林中, 水邊 海 拔:475 |
星毛紫金牛(學名:Ardisia stellata)為紫金牛科紫金牛屬下的一個種。 [1]
目錄
星毛紫金牛形態特徵
1-3 灌木,高約3米;小枝、花序、花梗、花萼外面及葉柄均密被銹色具柄的星狀毛和絨毛。
葉片堅紙質,倒披針形,長12—24厘米,寬3.5—7厘米,頂端漸尖,基部狹圓形近耳形,全緣,或具不整齊的極淺的波狀邊緣,葉面除中脈外幾無毛,背面密被銹色絨毛和有柄的星狀毛,尤以中脈及側脈為多,側脈15—20對,明顯,隆起,不成邊緣脈;柄長約5毫米。
復傘形花序或聚傘花序,頂生或近側生,長7—10厘米,花梗長5—10毫米;花長約3毫米,花萼近基部連合,萼片三角狀披針形,長約1毫米,急尖,裡面具短柔毛,具腺點;花瓣粉紅色,廣卵形,鈍或近急尖,無腺點,有時外面被柔毛,裡面無毛;雄蕊長達花瓣的2/3;花絲極短;花葯卵形,頂端點尖,背部具腺點;雌蕊與花瓣等長,無毛。
果球形,直徑4—5毫米,暗紅色或帶黑色,無毛。花期約5月,果期未詳。
Shrubs ca. 3 m tall, densely reddish stellate tomentose throughout; stellate hairs stipitate. Branchlets terete, 2.5-3.5 mm in diam., strongly longitudinally ridged. Petiole canaliculate, 3-5 mm; leaf blade oblanceolate, 12-24 × 3.5-7 cm, papery, dull and glabrescent adaxially except for midrib, base subauriculate, margin flat, entire or obscurely undulate, apex acute or acuminate; lateral veins 15-20 on each side of midrib, prominent, raised, marginal vein absent. Inflorescences terminal or sublateral, paniculate, branches umbellate or cymose, 7-10 cm. Flowers papery, pink, ca. 3 mm. Pedicel (5-)7-10 mm. Sepals triangular lanceolate, 1.2-1.5 mm, densely tomentose, punctate, margin entire and glabrous, apex acute. Petals nearly free, broadly ovate, epunctate or sparsely punctate, sparsely pubescent abaxially, glabrescent, margin entire, apex obtuse or subacute. Stamens ca. 2/3 as long as petals; filaments obsolete; anthers ovate, punctate dorsally, dehiscent by longitudinal slits, apex caudate. Pistil ca. as long as petals; ovary globose, glabrous, punctate; ovules numerous, multiseriate. Stigma punctiform. Fruit globose, dull red or reddish black, 4-5 mm in diam., stellate tomentose. Fl. May, fr. Oct.
Evergreen broad-leaved forests, mountains, stream sides, damp places; ca. 500 m. S Yunnan [Vietnam].
星毛紫金牛生長環境
海拔約475米的林下或水邊蔭處。