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青楷枫 |
中文名称:青楷枫 拉丁学名:Acer tegmentosum Maxim. 界:植物界 门纲:被子植物门、 双子叶植物纲 亚纲:原始花被亚纲 目科:无患子目、 科:槭树科 属:槭树属 英文名:Acer tegmentosum Maxim. |
青楷枫,学名 Acer tegmentosum Maxim.,属于槭树科、槭树属,落叶乔木,Acer tegmentosum Maximowicz, Bull. Cl. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg. 15: 125. 1856.,青楷枫 qing kai feng,Acer pensylvanicum Linnaeus var. tegmentosum (Maximowicz) Wesmael.,Trees to 15 m tall, andromonoecious. Bark dark gray. Branchlets glabrous, glaucous white during winter; winter buds blue, ellipsoid. Leaves deciduous; petiole 4-7(-13) cm, glabrous; leaf blade abaxially pale green, suborbicular-ovate, 10-12 × 7-9 cm, papery, abaxially with yellowish barbed hairs at vein axils, adaxially glabrous, primary veins 5, lateral veins 7 or 8 pairs, base rounded or subcordate,分布于黑龙江省、吉林省、辽宁省。 [1]
形态特征
落叶乔木,高10-15米。树皮灰色或深灰色,平滑,现裂纹。几小枝无毛,当年生小枝紫色或紫绿色,多年生枝黄绿色或灰褐色。冬芽椭圆形;鳞片浅褐色,无毛,叶纸质,近于圆形或卵形,长10-12厘米,宽7-9厘米,边缘有钝尖的重锯齿。
基部圆形或近于心脏形,3-7裂,通常5 裂;裂片三角形或钝尖形,先端常具短锐尖头;裂片间的凹缺通常钝尖,上面深绿色,无毛,下面淡绿色,脉腋有淡黄色的丛毛;主脉5条,由基部生出,侧脉7-8对,均在上面微现,在下面显著;
叶柄长4-7厘米,稀达13厘米,无毛。花黄绿色,杂性,雄花与两性花同株,赏成无毛的总状花序;萼片5,长圆形,先端钝形,长3毫米,宽1.5毫米;花瓣5,倒卵形,长3毫米,宽2毫米;雄蕊8;无毛,在两性花中不发育;
花盘无毛,位于雄蕊的内侧;子房无毛,在雄花中不发育,花柱短,柱头微被短柔毛,略弯曲。翅果无毛,黄褐色;小坚果微扁平;翅连同小坚果长2.5-3厘米,宽1-1.3厘米,张开成钝角或近于水平;果梗细瘦,长约5毫米。花期4月,果期9月。
Acer tegmentosum Maximowicz, Bull. Cl. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg. 15: 125. 1856. 青楷枫 qing kai feng
Acer pensylvanicum Linnaeus var. tegmentosum (Maximowicz) Wesmael.
Trees to 15 m tall, andromonoecious. Bark dark gray. Branchlets glabrous, glaucous white during winter; winter buds blue, ellipsoid. Leaves deciduous; petiole 4-7(-13) cm, glabrous; leaf blade abaxially pale green, suborbicular-ovate, 10-12 × 7-9 cm, papery, abaxially with yellowish barbed hairs at vein axils, adaxially glabrous, primary veins 5, lateral veins 7 or 8 pairs, base rounded or subcordate, margin doubly serrulate, usually 3- or 5-lobed, rarely with 2 small basal lobes; lobes ovate, apex acuminate.
Inflorescence pendulous, racemose, 15-flowered, slender, glabrous. Pedicel ca. 5 mm, very slender. Sepals 5, oblong, ca. 3 × 1.5 mm, apex obtuse. Petals 5, obovate, ca. 3 × 2 mm. Stamens 8, glabrous, rudimentary in pistillate flowers. Disk glabrous, intrastaminal.
Ovary glabrous, rudimentary in staminate flowers; style short. Fruit yellowish brown, glabrous; nutlets flat or slightly convex; wing including nutlet 2.5-3 × 1-1.3 cm, wings spreading obtusely or nearly horizontally. Fl. Apr, fr. Sep. 2n = 26.
Coniferous and mixed forests; 500-1000 m. Heilongjiang, Jilin, Liaoning [Korea, E Russia].
标本鉴定信息
学名 Acer tegmentosum Maxim. 中文名 青楷枫
鉴定人 陈锋 鉴定时间 20091012
标本采集信息
采集人 M.Chen 采集号 621 采集时间 19330920
采集地 中国 海拔 100 生境 mountain slope 习性 物候期 无花有果