弯梗紫金牛
弯梗紫金牛 |
中文学名:弯梗紫金牛 二名法:Ardisia retroflexa 界:植物界 门:被子植物门 Angiospermae 纲:双子叶植物纲 Dicotyledoneae 亚 纲:合瓣花亚纲 Sympetalae 目:报春花目 Primulales 科:紫金牛科 Myrsinaceae 亚 科:紫金牛亚科 Myrsinoideae 属:紫金牛属 Ardisia zu:顶序组 Sect. Acrardisia |
弯梗紫金牛(学名:Ardisia retroflexa)为紫金牛科紫金牛属下的一个种。 [1]
目录
弯梗紫金牛形态特征
灌木,高1-2米;枝条细,开展,幼时密被锈色鳞片,以后渐脱落。
叶片坚纸质,椭圆状披针形或近长圆形,顶端急尖或渐尖,基部楔形,长8-15厘米,宽2-4厘米,全缘,两面无毛,中脉于背面显明,隆起,侧脉15-18对,平展,细,于叶面微下凹,背面略隆起,连成边缘脉或边缘脉不明显,细脉网状,不甚明显;叶柄长4-12毫米。
由亚伞形花序组成的金字塔形圆锥花序,顶生,长约12厘米,宽约10厘米,总轴成“之”字形,总梗与花梗细,被锈色鳞片,反折;花梗长3-6 (-10) 毫米;花长约2毫米,花萼仅基部连合,长约1毫米,萼片卵形,顶端急尖,具缘毛,无腺点,无毛;花瓣白色,卵形,顶端急尖,无腺点,无毛;雄蕊较花瓣短,花药卵形,背部具腺点;雌蕊与花瓣等长,子房球形,无毛。
果球形,直径约5毫米,红色,具纵肋,多少具腺点。
花期约4月,果期约8月。
Shrubs 1-2 m tall. Branchlets slightly angular, 1.5-2 mm in diam., densely and minutely reddish brown scaly, glandular papillate, glabrescent. Petiole canaliculate, 4-12 mm; leaf blade elliptic, or lanceolate, 8-15 × 2-4 cm, papery, glabrous, bullate, base cuneate, margin revolute, entire, apex acute or acuminate; lateral veins 15-18 on each side of midrib, slightly raised abaxially, marginal vein present. Inflorescences terminal, 10-12 cm, paniculate, branches umbellate, rachis strongly flexuous to geniculate. Flowers papery, white, ca. 2 mm. Pedicel 3-6(-10) mm, recurved. Sepals ovate, 0.8-1 mm, glabrous, pellucid punctate, margin crenulate, ciliate, apex acute. Petals nearly free, ovate, glabrous, not punctate, apex acute. Stamens subequalling petals; anthers ovate, punctate dorsally, apex acute to subapiculate. Pistil as long as petals. Style as long as globose ovary, glabrous. Fruit red, globose, ca. 5 mm in diam., distinctly longitudinally ribbed, sparsely punctate. Fl. Apr, fr. Aug.
弯梗紫金牛生长环境
密林下荫湿的地方。