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                      weizhidan

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                      最近更新:2015-11-23 14:28:55

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                      weizhidan

                      2015-11-26 10:22:05

                      半侧膜秋海棠Begonia semiparietalis
                      编辑

                      Begonia semiparietalis Yan Liu et al. in Bot. Stud. 47: 218. 2006.

                      种间区别

                      半侧膜秋海棠亦与越南秋海棠Begonia bonii Gagnep.略似,区别在于前者叶片常有沿主脉分布的白色斑纹、叶上表面被稀疏的刚毛状柔毛、子房与果实具有较长的腺状柔毛、子房或果实的上半部呈侧膜胎座,中部向基部渐变为中轴胎座。

                      形态描述

                      Herbs, rhizomatous. Rhizomes 9-12 mm in diam. Leaves basal; stipules triangular or ovate-triangular, 7-10 × 5-9 mm; blade with white spots along major veins, sometimes abaxially dark brown, with pale green major veins, broadly ovate or suborbicular, 3.5-15 × 3-13 cm, rugose, adaxially sparsely setulose-pilose, basally 5-7-veined, tertiary veins percurrent, base deeply cordate. Inflorescence a dichasial cyme with 6-25 flowers; peduncle 1.2-3 cm, glabrous; bracts reddish, ovate, oblong, or orbicular. Staminate flowers: tepals 4, outer 2 reddish or pinkish, suborbicular; inner 2 tepals narrowly obovate or oblanceolate; androecium zygomorphic; stamens 13-40; anthers oblong-obovoid, apex subemarginate. Pistillate flowers: tepals 3, outer 2 tepals pinkish or reddish, suborbicular; inner 1 pinkish white, oblanceolate or narrowly obovate, glabrous; ovary reddish, ellipsoid, long glandular pilose, unequally 3-winged, 1-loculed with parietal placentation above middle, lower half with axile placentation; abaxial wing lunate; styles 3. Capsule nodding, reddish when fresh. 2n = 30*.

                      FOC

                      主要用途

                      模式信息

                      广西扶绥县,2005-10-04,Ching-I Peng,Yan Liu, Shin-Ming Ku & Huan-Yu Chen 20327-A(holotype: IBK; isotype: HAST)。

                      分布地区

                      产广西扶绥,生长在石灰岩山上。

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