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多枝紫金牛 |
中文学名:多枝紫金牛 拉丁学名:Ardisia sieboldii Miq. 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 组:腋序组 |
多枝紫金牛(学名:Ardisia sieboldii Miq.)为紫金牛科紫金牛属下的一个种。产浙江、福建、台湾,于山间林中。 [1]
多枝紫金牛形态特征
多枝紫金牛, 灌木,稀小乔木,高1-6(-10以上)米或更多,分枝多;小枝粗壮,幼时被疏鳞片及细皱纹。
叶片纸质或革质,倒卵形或椭圆状卵形,有时披针形,顶端广急尖或纯,有时近圆形,长7-14厘米,宽2-4厘米,全缘,两面无毛,有时背面被细鳞片,侧脉多数,不甚明显,连成近边缘的不甚明显的边缘脉;叶柄长5-10毫米。
复亚伞形花序或复聚伞花序,腋生,通常于小枝顶端叶腋,总梗长2-4 (-7) 厘米,多花,每亚伞形花序梗长5-15毫米,花梗长约5毫米,均被锈色鳞片和微柔毛;花长约3毫米,花萼基部连合达1/3,萼片卵形,顶端急尖,长1-1.5毫米,多少具缘毛,两面无毛,具少数腺点;花瓣白色,广卵形,顶端急尖,两面无毛,多少具腺点;雄蕊达花瓣长的3/4,花丝明显,长与花药几相等,花药卵形,顶端急尖,背面具腺点或无;雌蕊与花瓣等长或略长,子房卵珠形,无毛,具腺点;胚珠多数,数轮。
果球形,直径约7毫米,红色至黑色,略肉质,有或无腺点。花期5-6月,果期约1月。
本种与罗伞树 (A. quinquegona Bl.) 十分相似,但本种叶片较厚,通常为倒卵形,顶端广急尖或钝,花序腋生,无叶,花极多等,可以区别。
其次干标本的叶为浅褐色,而罗伞树为灰蓝色。
Shrubs or rarely small trees to 10 m tall. Branchlets terete 2-3 mm in diam., sparsely brown scaly when young, finely wrinkled. Petiole marginate, 5-10 mm; leaf blade obovate to oblanceolate, 7-14 × 2-4 cm, leathery, dull adaxially, glabrous or sometimes minutely brown scaly abaxially, base cuneate, margin entire, usually revolute, apex broadly to narrowly acute; lateral veins 14-25 on each side of midrib, inconspicuous, marginal vein obscure. Inflorescences axillary, near ends of branches, paniculate, branches subumbellate or cymose, 3-4(-7) cm, glabrous. Flowers membranous, white, ca. 3 mm. Pedicel ca. 5 mm, brown scaly. Sepals ovate, 1-1.5 mm, sparsely punctate, margin entire, ciliate, apex acute. Petals nearly free, broadly ovate, inconspicuously punctate, glabrous, apex acute. Stamens ca. 3/4 as long as petals; filaments equal to anther length; anthers ovate, prominently black or inconspicuous pellucid punctate dorsally, dehiscent by pores opening into large longitudinal slits, apex apiculate. Pistil ca. as long as petals; ovary glabrous, punctate; ovules numerous, multiseriate. Fruit globose, red to blackish, ca. 7 mm in diam., somewhat fleshy. Fl. Mar-Jun, fr. Jan-Apr. 2n = 48.
多枝紫金牛生长环境
多枝紫金牛生于山间林中。