禿子楝樹
禿子楝樹 |
中文學名:禿子楝樹 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 |
禿子楝樹(tū zǐ liàn shù,學名:Decaspermum glabrum)為桃金娘科子楝樹屬下的一個種。 [1]
目錄
禿子楝樹植物形態
灌木;嫩枝纖細,圓柱形,無毛,干後黑褐色。葉片紙質,卵狀披針形或披針形,長5-5厘米,寬1-1.7厘米,先端長尖,基部楔形或略鈍,干後上面變黑色,稍發亮,下面深褐色,絕對無毛,多細小腺點,側脈不明顯;葉柄長3-5毫米,纖細,無毛。
聚傘花序腋生,長約3厘米,有花4-9朵,總梗及花梗纖細,無毛;苞片小葉狀,長6-8毫米,小苞片針形,長2毫米,均無毛。花4數,萼管無毛,萼片三角狀卵形,先端尖,長1.5毫米,無毛;花瓣倒卵形,長2-2.5毫米,邊緣有稀疏睫毛;雄蕊比花瓣稍長,無毛 。[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.
禿子楝樹分布範圍
禿子楝樹其他
外形很像子楝樹D. gracilentum Merr. et Perry,但嫩枝及葉片均無毛,花4數,總梗纖細,花序及花亦無毛。
在具有4數花的一群當中,它和柬埔寨子楝樹D. cambodiana Gagnep.很容易分開來,後者的葉片倒卵形,寬達5厘米,花的特徵則很相似。它和華夏子楝樹 D. esquirolii (Levl.) Chang et Miau也容易區別,後者的枝和葉有毛,萼片鈍,被毛,花瓣也較長。