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星毛紫金牛 |
中文学名:星毛紫金牛 二名法:Ardisia stellata 界:植物界 门:被子植物门 纲:双子叶植物纲 亚 纲:合瓣花亚纲 目:报春花目 科:紫金牛科 亚 科:紫金牛亚科 属:紫金牛属 亚 属:腋序组 生 境:林中, 水边 海 拔:475 |
星毛紫金牛(学名:Ardisia stellata)为紫金牛科紫金牛属下的一个种。 [1]
星毛紫金牛形态特征
1-3 灌木,高约3米;小枝、花序、花梗、花萼外面及叶柄均密被锈色具柄的星状毛和绒毛。
叶片坚纸质,倒披针形,长12—24厘米,宽3.5—7厘米,顶端渐尖,基部狭圆形近耳形,全缘,或具不整齐的极浅的波状边缘,叶面除中脉外几无毛,背面密被锈色绒毛和有柄的星状毛,尤以中脉及侧脉为多,侧脉15—20对,明显,隆起,不成边缘脉;柄长约5毫米。
复伞形花序或聚伞花序,顶生或近侧生,长7—10厘米,花梗长5—10毫米;花长约3毫米,花萼近基部连合,萼片三角状披针形,长约1毫米,急尖,里面具短柔毛,具腺点;花瓣粉红色,广卵形,钝或近急尖,无腺点,有时外面被柔毛,里面无毛;雄蕊长达花瓣的2/3;花丝极短;花药卵形,顶端点尖,背部具腺点;雌蕊与花瓣等长,无毛。
果球形,直径4—5毫米,暗红色或带黑色,无毛。花期约5月,果期未详。
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].
星毛紫金牛生长环境
海拔约475米的林下或水边荫处。