十蕊枫
| 十蕊枫 |
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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]
目录
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].