瓊南子楝樹
瓊南子楝樹 |
中文學名:瓊南子楝樹 界:植物界 門:被子植物門 綱:雙子葉植物綱 目:桃金娘目 科:桃金娘科 屬:子楝樹屬 |
瓊南子楝樹(qióng nán zǐ liàn shù,學名:Decaspermum austrohainanicum)為桃金娘科子楝樹屬下的一個種。 [1]
目錄
瓊南子楝樹形態特徵
灌木;嫩枝被灰褐色柔毛,老枝灰色,無毛。
葉片革質,長倒卵形或倒卵形,初時上下兩面被灰色柔毛,以後變無毛,長3-5厘米,寬1.7-2.6厘米,先端急短尖,尖頭鈍,基部楔形,干後上面暗褐色,稍發亮,有多數細小而陷下的腺點,下面深褐色,側脈5-7對,不明顯或有時隱約可見;葉柄長4-7毫米。
花單生或3-5朵排成總狀或聚傘花序,生於枝頂葉腋內;花梗長4-8毫米,被褐毛;苞片長圓形或披針形,長2-4毫米,被褐毛;小苞片鱗片狀;萼管短,萼片5,闊卵形,長不及1毫米,被灰毛;花瓣5,卵形,長2毫米,外側有稀疏柔毛;雄蕊比花瓣略長,無毛 。[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.
瓊南子楝樹分布範圍
瓊南子楝樹主要價值
具有祛風除濕 、殺蟲止癢、清熱止痢的功效。
瓊南子楝樹其他
在國產3個具有5數花的種類當中,彼此並不接近。本種的嫩枝及花序有毛,葉片倒卵形,花單生或3-5朵排成聚傘花序,萼齒短。
從外形上看來,它近似柬埔寨子楝樹D. cambodianum Gagnep.,但後者嫩枝及花序均無毛,葉較大,花4數。