巨果楓
| 巨果楓 |
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中文名稱：巨果楓 拉丁學名：acer thomsonii 界：植物界 門綱：被子植物門、 雙子葉植物綱 亞綱：原始花被亞綱 目科：無患子目、 科：槭樹科 屬：槭樹屬 英文名：acer thomsonii |
巨果楓，學名 acer thomsonii，屬於槭樹科、槭樹屬，落葉喬木，Acer thomsonii Miquel, Arch. Neerl. 2: 470. 1867. 巨果楓 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.分布於西藏自治區、雲南省。 [1]
目錄
形態
落葉喬木，高8-12米。樹皮深褐色，平滑。小枝圓柱形，有蠟質白粉，無毛，當年生的嫩枝淡紫綠色，多年生老枝紫褐色或深褐色。
葉近於革質，輪廓近於橢圓形，長10-15厘米，寬7-11 厘米，基部近於圓形或略近於心臟形，中段以上3裂，裂片三角形，通常向前直伸，先端漸尖或銳尖；
邊緣近於全緣，裂片間的凹缺銳尖或鈍尖，深達葉片長度的1/3,淺紫綠色、有光澤，上面無毛，下面的脈腋有叢毛;主脈3條，在上面顯著，在下面凸起；；
側脈7-10對和網狀的小葉脈在兩面均顯著；葉柄粗壯，淺紫綠色，長2-3.5厘米。花序圓錐狀，連同長2-2.5厘米的總花梗在內約長8-10厘米，每小花序有3-5花；
花梗細瘦、長3-5毫米;萼片5，淡紫綠色，三角形;花瓣5，淡黃色;雄蕊8;子房有很密的短柔毛，花柱短、分2枝。小堅果近於卵圓形，長8毫米，寬6毫米；
嫩時淡紫色，成熟後淡黃色，翅鐮刀形，連同小堅果長3-3.5厘米，張開近於水平。花期4月下旬至5月上旬，果期9月。
Acer thomsonii Miquel, Arch. Neerl. 2: 470. 1867. 巨果楓 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.
產地生境
Mixed forests, valleys; 1800-3000 m. S Xizang, S Yunnan [Bhutan, N India, Myanmar, Nepal, Thailand].