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十蕊枫 |
中文学名:十蕊枫 拉丁学名:Acer laurinum 门:被子植物门 科:槭树科 属:槭属 |
十蕊枫是槭树科槭属植物。产云南南部、广西南部、广东南部和海南岛。生于海拔800-1500米的阔叶林中。[1]
形态特征(Description):
落叶乔木,常高8米,稀达12米。树皮灰褐色或深褐色。小枝粗壮,无毛;当年生枝 紫色或紫绿一色;多年生枝紫褐色。
冬芽淡褐色,近于卵圆形;芽鳞的边缘有睫毛。叶革质或近于革质,全缘,卵状椭圆形或长圆卵形,8-15厘米,宽4-7厘米,先端钝尖或短渐尖,基部楔形或阔楔形;上面浅绿色或淡褐绿色,下面淡绿色或淡褐绿色;主脉和5-6对侧脉在上面显著,在下面凸起,基生脉长达叶片的1/3-1/2;小叶脉成网状;叶柄长5-7厘米,无毛,淡紫色。
花淡紫褐色,单性,雌雄异株,成长2厘米的细瘦无毛的总状花序;总花模约长1厘米,无毛;叶已长大之后花始从腋芽开出;萼片5,卵形,无毛,长2毫米;花瓣5,比萼片短;雄蕊8-12,无毛,长约4毫米;花盘环状,微被短柔毛,位于雄蕊的内侧;子房无毛,花柱短,在雄花中雌蕊不发育;花梗长5-8毫米,细瘦,无毛。
翅果嫩时为绿色或淡紫绿色,成熟时为棕褐色或淡褐黄色,脉纹显著;小坚果扁乎,长1.5厘米,宽7毫米;翅镰刀形,接近顶端部分最宽,翅与小坚果共长6-7厘米,宽2厘米,有时仅有一翅发育良好,张开近于锐角或直角;果梗长2-3厘米,细瘦无毛。花期6月,果期10月。
Trees evergreen, to 30(-48) m tall, androdioecious, sometimes andromonoecious. Bark gray. Branchlets green, glabrous; winter buds ovoid, scales 7-11 pairs. Petiole (1.5-)3-6(-10) cm, glabrous; leaf blade abaxially glaucous, whitish or light blue-gray, adaxially glossy dark green, lanceolate or oblong-elliptic to ovate, 9-15 × 3-8 cm, abaxially ± pubescent, trinerved, lateral veins 5 or 6 pairs, 2 basal veins reaching beyond middle of blade, base rounded or cuneate or broadly cuneate, margin entire, glabrous, apex shortly acuminate to obtuse. Inflorescence cymose-paniculate, appearing in axils of fallen leaves, 2.5-10 cm, glabrous or pubescent; peduncle 5-35 mm. Pedicel 4-17 mm, glabrous. Flowers pale yellowish. Sepals 5, ovate, 2.5-3 mm, glabrous. Petals 5, 1.5-2.5 mm. Stamens (4-)8-12, glabrous; filaments ca. 5 mm in staminate flowers, ca. 2.2 mm in pistillate flowers. Disk amphistaminal, glabrous. Ovary rudimentary in staminate flowers. Samara brownish yellow; strongly veined; nutlets slightly convex, ca. 15 × 7 mm, pubescent or nearly glabrous; wing falcate, broadest near apex, including nutlet 4-7 × 2-3 cm, wings spreading acutely. Fruit peduncle 1-3 cm, stout. Fl. Jun-Sep, fr. Sep-Dec. 2n = 26.
Evergreen forests, scattered; 700-2500 m. SW Guangxi, Hainan, SE Xizang, NW and S Yunnan [Cambodia, S India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam].
分布(Distribution):
产云南南部、广西南部、广东南部和海南岛。生于海拔800-1500米的阔叶林中。越南也有分布。