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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。

參考來源

  1. 瓊南子楝樹, 植物智, 2020-01-18
  2. FOC >> Vol.13 (2007) >> Myrtaceae >> Decaspermum