十蕊楓
十蕊楓 |
中文學名:十蕊楓 拉丁學名:Acer laurinum 門:被子植物門 科:槭樹科 屬:槭屬 |
十蕊楓是槭樹科槭屬植物。產雲南南部、廣西南部、廣東南部和海南島。生於海拔800-1500米的闊葉林中。[1]
目錄
形態特徵(Description):
落葉喬木,常高8米,稀達12米。樹皮灰褐色或深褐色。小枝粗壯,無毛;當年生枝 紫色或紫綠一色;多年生枝紫褐色。
冬芽淡褐色,近於卵圓形;芽鱗的邊緣有睫毛。葉革質或近於革質,全緣,卵狀橢圓形或長圓卵形,8-15厘米,寬4-7厘米,先端鈍尖或短漸尖,基部楔形或闊楔形;上面淺綠色或淡褐綠色,下面淡綠色或淡褐綠色;主脈和5-6對側脈在上面顯著,在下面凸起,基生脈長達葉片的1/3-1/2;小葉脈成網狀;葉柄長5-7厘米,無毛,淡紫色。
花淡紫褐色,單性,雌雄異株,成長2厘米的細瘦無毛的總狀花序;總花模約長1厘米,無毛;葉已長大之後花始從腋芽開出;萼片5,卵形,無毛,長2毫米;花瓣5,比萼片短;雄蕊8-12,無毛,長約4毫米;花盤環狀,微被短柔毛,位於雄蕊的內側;子房無毛,花柱短,在雄花中雌蕊不發育;花梗長5-8毫米,細瘦,無毛。
翅果嫩時為綠色或淡紫綠色,成熟時為棕褐色或淡褐黃色,脈紋顯著;小堅果扁乎,長1.5厘米,寬7毫米;翅鐮刀形,接近頂端部分最寬,翅與小堅果共長6-7厘米,寬2厘米,有時僅有一翅發育良好,張開近於銳角或直角;果梗長2-3厘米,細瘦無毛。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].