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秀丽槭Acer elegantulum

时间:2013-07-15 16:40来源:未知 作者:徐晔春 点击:
秀丽槭,Acer elegantulum,青枫







中文名(Chinese Name):秀丽槭
学名(Scientific Name):Acer elegantulum Fang et P. L. Chiu
英文名(English Common Name):
别名(Chinese Common Name):青枫
异名(Synonym):Acer yaoshanicum Fang;Acer elegantulum var. macrurum Fang et P. L. Chiu;Acer olivaceum Fang et P. L. Chiu
科属(Family & Genus):槭树科(Aceraceae)槭树属
形态特征(Description):落叶乔木,高9-15米。树皮粗糙,深褐色。小枝圆柱形,无毛,当年生嫩枝淡紫绿色,直径2毫米,多年生老枝深紫色。叶薄纸质或纸质,基部深心脏形或近于心脏形,叶片的宽度大于长度,宽7-10厘米,长5.5 8厘米,通常5裂,中央裂片与侧裂片卵形或三角状卵形,长2.5-3.5厘米,近基部宽2.5-3厘米,先端短急锐尖,尖尾长8-10毫米,基部的裂片较小,边缘具紧贴的细圆齿,裂片间的凹缺锐尖,上面绿色,干后淡紫绿色,无毛,下面淡绿色,除脉腋被黄色丛毛外其余部分无毛;初生脉5条,在两面均显著;次生脉10-11对,约以80度的角与初生脉叉分,在下面较在上面显著,小叶脉仅微显著,叶柄长2-4厘米,淡紫绿色,无毛。花序圆锥状,初系淡绿色,无毛,连同长2-3厘米的总花梗在内共长7-8厘米,花梗长1-1.2厘米。花杂性,雄花与两性花同株,萼片5,绿色,长圆卵形或长椭圆形,长3毫米,无毛;花瓣5,深绿色,倒卵形或长圆倒卵形,和萼片近于等长;雄蕊89较花瓣长2倍,花丝无毛,花药淡黄色;花盘位于雄蕊的外侧;子房紫色,有很密的淡黄色长柔毛,花柱长3毫米,无毛,2裂,柱头平展。翅果嫩时淡紫色,成熟后淡黄色,小坚果凸起近于球形,直径6毫米,翅张开近于水平,中段最宽,常宽达1厘米,连同小坚果长2-2.3厘米。花期5月,果期9月。
分布(Distribution):产浙江西北部、安徽南部和江西。生于海拔700-1000米的疏林中。模式标本采自浙江昌化。
用途(Use):
引自中国植物志英文版FOC Vol. 11 Page 524, 529    
Acer elegantulum W. P. Fang & P. L. Chiu, Acta Phytotax. Sin. 17(1): 76. 1979.
秀丽枫 xiu li feng| Aceraceae  | Acer
Acer elegantulum var. macrurum W. P. Fang & P. L. Chiu; A. olivaceum W. P. Fang & P. L. Chiu; A. yaoshanicum W. P. Fang.
Trees to 15 m tall, andromonoecious. Bark on trunk dark brown, scabrous; bark on branches green. Petiole 2.8-6 cm, glabrous; leaf blade abaxially light green, adaxially green, somewhat broader than long, 5-13 × 7-16 cm, thinly papery, primary veins 5, level on both surfaces, lateral veins not distinct, adaxially glabrous, abaxially glabrous with exception of axillary tufts and pubescent or glabrous on primary veins, usually 5-lobed or rarely 7-lobed, base truncate or broadly cordate; lobes ovate or oblong, basal lobes smaller, margin serrulate, apex acute to caudate-acuminate. Inflorescence paniculate, terminal on a 2-leaved branchlet; peduncles 2-3 cm. Sepals 5, light green, ovate to oblong, ca. 2 mm. Petals 5, light green, obovate or oblong-obovate, ca. 2 mm. Stamens 8. Disk glabrous, extrastaminal. Ovary villous. Samara glabrous; nutlets convex, ca. 6 × 5 mm; wings spreading obtusely, wing including nutlet 2-2.5 cm × 8-10 mm. Fl. May, fr. Sep.
Mountains, forests, usually in valleys; 200-1400 m. S Anhui, Fujian, Guangxi, Guizhou, Hunan, Jiangxi, Zhejiang.
Acer elegantulum is characterized by its velutinous ovary and nearly glabrous abaxial veins and petiole. Acer pubinerve differs by its velutinous abaxial veins and petiole. These two taxa are difficult to distinguish and possibly can be combined. They differ from A. sinense by their smaller papery leaves, slender petioles, smaller samaras, and velutinous ovary.
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