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琼南子楝树 |
中文学名:琼南子楝树 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 |
琼南子楝树(qióng nán zǐ liàn shù,学名:Decaspermum austrohainanicum)为桃金娘科子楝树属下的一个种。 [1]
琼南子楝树形态特征
灌木;嫩枝被灰褐色柔毛,老枝灰色,无毛。
叶片革质,长倒卵形或倒卵形,初时上下两面被灰色柔毛,以后变无毛,长3-5厘米,宽1.7-2.6厘米,先端急短尖,尖头钝,基部楔形,干后上面暗褐色,稍发亮,有多数细小而陷下的腺点,下面深褐色,侧脉5-7对,不明显或有时隐约可见;叶柄长4-7毫米。
花单生或3-5朵排成总状或聚伞花序,生于枝顶叶腋内;花梗长4-8毫米,被褐毛;苞片长圆形或披针形,长2-4毫米,被褐毛;小苞片鳞片状;萼管短,萼片5,阔卵形,长不及1毫米,被灰毛;花瓣5,卵形,长2毫米,外侧有稀疏柔毛;雄蕊比花瓣略长,无毛 。[2]
Shrubs. Branchlets grayish brown pubescent. Petiole 4-7 mm; leaf blade obovate, 3-5 × 1.7-2.6 cm, stiffly papery to leathery, abaxially brown when dry, adaxially reddish brown and glossy when dry, abaxially glabrous, adaxially densely impressed punctate, secondary veins 5-7 on each side of midvein, base cuneate, margin revolute, apex abruptly acute with an obtuse acumen. Inflorescences axillary, dichasia, racemes, or thyrses but sometimes solitary; bracts oblong to lanceolate, 2-4 mm, pubescent. Flowers 5-merous, only staminate seen; bracteoles scalelike. Hypanthium sparsely pubescent. Calyx lobes 5, broadly ovate, less than 1 mm, grayish pubescent. Petals 5, ovate, ca. 2 mm, outside sparsely pubescent. Stamens as long as petals, glabrous. Ovary rudimentary. Fruit not seen.
● S Hainan (Yaxian: Yanglin Shan).
This species is known only from type gathering.
琼南子楝树分布范围
琼南子楝树主要价值
具有祛风除湿 、杀虫止痒、清热止痢的功效。
琼南子楝树其他
在国产3个具有5数花的种类当中,彼此并不接近。本种的嫩枝及花序有毛,叶片倒卵形,花单生或3-5朵排成聚伞花序,萼齿短。
从外形上看来,它近似柬埔寨子楝树D. cambodianum Gagnep.,但后者嫩枝及花序均无毛,叶较大,花4数。