秃子楝树
秃子楝树 |
中文学名:秃子楝树 界:植物界 门:被子植物门 纲:双子叶植物纲 目:桃金娘目 科:桃金娘科 属:子楝树属 |
秃子楝树(tū zǐ liàn shù,学名:Decaspermum glabrum)为桃金娘科子楝树属下的一个种。 [1]
目录
秃子楝树植物形态
灌木;嫩枝纤细,圆柱形,无毛,干后黑褐色。叶片纸质,卵状披针形或披针形,长5-5厘米,宽1-1.7厘米,先端长尖,基部楔形或略钝,干后上面变黑色,稍发亮,下面深褐色,绝对无毛,多细小腺点,侧脉不明显;叶柄长3-5毫米,纤细,无毛。
聚伞花序腋生,长约3厘米,有花4-9朵,总梗及花梗纤细,无毛;苞片小叶状,长6-8毫米,小苞片针形,长2毫米,均无毛。花4数,萼管无毛,萼片三角状卵形,先端尖,长1.5毫米,无毛;花瓣倒卵形,长2-2.5毫米,边缘有稀疏睫毛;雄蕊比花瓣稍长,无毛 。[2]
Decaspermum glabrum Chang et Miau in Act. Bot. Yunnan. 4 (1): 25. 1982.
Shrubs. Branchlets reddish brown when dry, slender, terete, glabrous. Petiole 3-5 mm, slender, glabrous; leaf blade ovate-lanceolate to lanceolate, 2.5-5 × 1-1.7 cm, stiffly papery, abaxially brown when dry, adaxially shinny black when dry, abaxially densely punctate and glabrous, secondary veins inconspicuous, base cuneate to obtuse, apex acuminate. Inflorescences axillary, dichasia, racemes, or thyrses, 4-9-flowered; peduncle slender, glabrous; bracts leaflike, 6-8 mm. Flowers 4-merous, only staminate known; bracteoles subulate, ca. 2 mm, glabrous. Hypanthium glabrous. Calyx lobes triangular ovate, ca. 1.5 mm, glabrous, apex acute. Petals obovate, 2-2.5 mm, margin sparsely ciliate. Stamens as long as petals. Ovary rudimentary.
● Mountain slopes. SW Guangdong (Zhanjiang Diqu).
This species is known only from type gathering.
秃子楝树分布范围
秃子楝树其他
外形很像子楝树D. gracilentum Merr. et Perry,但嫩枝及叶片均无毛,花4数,总梗纤细,花序及花亦无毛。
在具有4数花的一群当中,它和柬埔寨子楝树D. cambodiana Gagnep.很容易分开来,后者的叶片倒卵形,宽达5厘米,花的特征则很相似。它和华夏子楝树 D. esquirolii (Levl.) Chang et Miau也容易区别,后者的枝和叶有毛,萼片钝,被毛,花瓣也较长。