巨果枫查看源代码讨论查看历史
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中文名称：巨果枫 拉丁学名：acer thomsonii 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 thomsonii |
巨果枫，学名 acer thomsonii，属于槭树科、槭树属，落叶乔木，Acer thomsonii Miquel, Arch. Neerl. 2: 470. 1867. 巨果枫 ju guo feng，Acer franchetii Pax var. majus Hu; A. huanum W. P. Fang & C. C. Hsieh; A. sterculiaceum Wallich subsp. thomsonii (Miquel) A. E. Murray; A. villosum Wallich var. thomsonii (Miquel) Hiern.，Trees to 30 m tall, dioecious. Bark dark brown or brown. Branchlets greenish brown, rough, glabrous; winter buds ovoid, scales imbricate. Leaves deciduous; petiole 5-12 cm, subglabrous; leaf blade suborbicular or broadly ovate, 10-15(-30) × 8-15(-20) cm, subleathery, primary veins 5, lateral veins 6-8 pairs, base cordate, 3-lobed; lobes short, margin usually entire or repand, rarely few serrate, lateral lobes acute apically. Inflorescence lateral, racemose, pendulous. Sepals 5, elliptic. Petals 5, ca. as long as sepals. Stamens 8. Ovary glabrous. Infructescence 10-12 cm. Samara wing oblong, including nutlet 8-12 cm, wings spreading acutely or erectly. Fl. Apr, fr. Sep.分布于西藏自治区、云南省。 [1]
形态
落叶乔木，高8-12米。树皮深褐色，平滑。小枝圆柱形，有蜡质白粉，无毛，当年生的嫩枝淡紫绿色，多年生老枝紫褐色或深褐色。
叶近于革质，轮廓近于椭圆形，长10-15厘米，宽7-11 厘米，基部近于圆形或略近于心脏形，中段以上3裂，裂片三角形，通常向前直伸，先端渐尖或锐尖；
边缘近于全缘，裂片间的凹缺锐尖或钝尖，深达叶片长度的1/3,浅紫绿色、有光泽，上面无毛，下面的脉腋有丛毛;主脉3条，在上面显著，在下面凸起；；
侧脉7-10对和网状的小叶脉在两面均显著；叶柄粗壮，浅紫绿色，长2-3.5厘米。花序圆锥状，连同长2-2.5厘米的总花梗在内约长8-10厘米，每小花序有3-5花；
花梗细瘦、长3-5毫米;萼片5，淡紫绿色，三角形;花瓣5，淡黄色;雄蕊8;子房有很密的短柔毛，花柱短、分2枝。小坚果近于卵圆形，长8毫米，宽6毫米；
嫩时淡紫色，成熟后淡黄色，翅镰刀形，连同小坚果长3-3.5厘米，张开近于水平。花期4月下旬至5月上旬，果期9月。
Acer thomsonii Miquel, Arch. Neerl. 2: 470. 1867. 巨果枫 ju guo feng
Acer franchetii Pax var. majus Hu; A. huanum W. P. Fang & C. C. Hsieh; A. sterculiaceum Wallich subsp. thomsonii (Miquel) A. E. Murray; A. villosum Wallich var. thomsonii (Miquel) Hiern.
Trees to 30 m tall, dioecious. Bark dark brown or brown. Branchlets greenish brown, rough, glabrous; winter buds ovoid, scales imbricate. Leaves deciduous; petiole 5-12 cm, subglabrous; leaf blade suborbicular or broadly ovate, 10-15(-30) × 8-15(-20) cm, subleathery, primary veins 5, lateral veins 6-8 pairs, base cordate, 3-lobed; lobes short, margin usually entire or repand, rarely few serrate, lateral lobes acute apically.
Inflorescence lateral, racemose, pendulous. Sepals 5, elliptic. Petals 5, ca. as long as sepals. Stamens 8. Ovary glabrous. Infructescence 10-12 cm. Samara wing oblong, including nutlet 8-12 cm, wings spreading acutely or erectly. Fl. Apr, fr. Sep. 2n = 26.
产地生境
Mixed forests, valleys; 1800-3000 m. S Xizang, S Yunnan [Bhutan, N India, Myanmar, Nepal, Thailand].