黑叶蒲桃查看源代码讨论查看历史
黑叶蒲桃 |
中文学名:黑叶蒲桃 门:被子植物门 纲:双子叶植物纲 亚 纲:原始花被亚纲 目:桃金娘目 科:桃金娘科 属:玫瑰木属 种:黑叶蒲桃 |
黑叶蒲桃(学名:Syzygium thumra),是一种桃金娘科的乔木,分布于缅甸、马来西亚以及中国大陆的云南等地。 [1]
形态特征
乔木,高8米;嫩枝圆形或稍压扁,干后褐色。
叶片卵状椭圆形,长10-15厘米,宽5-7厘米,先端钝或略尖,基部宽而钝,上面干后黑色,有光泽,下面黑褐色,侧脉约25对,彼此相隔3-6毫米,在两面均突起,以80度开角平缓走向边缘,离边缘2毫米处结合成边脉,侧脉之间有明显网脉;叶柄长6-8毫米。
圆锥花序顶生,长9厘米,宽7厘米,总梗圆形,变黑色;花3朵簇生,花梗长2-3毫米;花蕾倒卵形,长5毫米,宽4毫米;萼管倒圆锥形,长3毫米,萼齿4,半圆形,长1毫米,宽2.5毫米;花瓣分离,阔卵形,长2.5毫米;雄蕊短;花柱与雄蕊同长。
果实球形,直径1.2厘米,干后黑色。花期4月 。[2]
Syzygium thumra (Roxb.) Merr. et Perry in Journ. Arn. Arb. 19: 103. 1938——Eugenia thumra Roxb. Fl. Ind. ed. 2, 2: 495. 1832; Duthie in Hook. f. Fl. Brit. Ind. 2: 481. 1879.
Eugenia thumra Roxburgh, Fl. Ind., ed. 1832, 2: 495. 1832.
Trees, 8-15 m tall, d.b.h. 25-30 cm. Branchlets brown when dry, terete or slightly compressed. Petiole 6-8 mm; leaf blade ovate-elliptic, 10-15 × 5-7 cm, leathery, abaxially blackish brown when dry, adaxially black and glossy when dry, secondary veins ca. 25 on each side of midvein, 3-6 mm apart, at an angle of ca. 80° from midvein, and raised on both surfaces, reticulate veins conspicuous between secondary veins, intramarginal veins ca. 2 mm from margin, base wide and obtuse, apex obtuse to slightly acute. Inflorescences terminal, paniculate cymes, ca. 9 × 7 cm; peduncle rounded, turning black. Flower buds obovoid, ca. 5 × 4 mm. Hypanthium obconic, ca. 3 mm. Calyx lobes 4, semiorbicular, ca. 1 × 2.5 mm. Petals distinct, broadly ovate, ca. 2.5 mm. Stamens 5-8 mm. Style as long as stamens. Fruit black when dry, globose, ca. 1.2 cm in diam. Fl. Apr, fr. Aug-Oct.
Broad-leaved evergreen forests, open slopes, valleys; 600-1000(-1200) m. S Yunnan [Laos, Malaysia, Myanmar, Thailand].