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                      词条创建者:

                      weizhidan

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                      最近更新:2015-11-19 16:27:16

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                      weizhidan

                      2015-11-26 10:12:35

                      扁果秋海棠Begonia platycarpa
                      编辑

                      Begonia platycarpa Y. M. Shui & W. H. Chen in Acta Bot. Yunnan. 27 (4): 368, fig. 9. 2005.

                      种间区别

                      本种与罗甸秋海棠Begonia porteri Levl. et Vant.相似,区别在于扁果秋海棠的花被片外面疏被毛,蒴果具3等翅,均为新月状。

                      形态描述

                      Herbs, rhizomatous. Rhizome 4-10 cm, 2-3 mm in diam., sparsely hirsute, hairs 2-3 mm; internodes 5-9 mm. Leaves all basal; stipules mostly persistent, reflexed, triangular, 6-8 × 3-4 mm, adaxially densely pilose; petiole 5-10 cm, hirsute (hairs 3-5 mm); blade very broadly ovate, 6-8 × 4-5.5 cm, papery, abaxially sparsely pilose (hairs 3-4 mm) on veins and glabrous on other parts, adaxially densely pilose (hairs ca. 3 mm), basally 6-veined, base obliquely deeply cordate, margin serrulate and with cilia 3-4 mm, apex obtuse. Inflorescences 12-15 flowers in a dichasial cyme; peduncle 5-8 cm, sparsely pilose (hairs ca. 3 mm); bracts obovate or ovate, 4-7 × 2-3.5 mm, abaxially sparsely pilose, margin ciliate, apex rounded or acute. Staminate flowers: tepals 4, outer 2 pink, suborbicular, 1-1.5 cm in diam., apex with red stripes, outside sparsely pilose, inner 2 white or pinkish, obovate, 1.2-1.6 × 4-6 mm; stamens numerous; filaments free, 1-1.1 mm; anthers yellow, obovoid, 1.2-1.3 × 0.5-0.7 mm, apex subemarginate. Pistillate flowers: tepals (2 or)3(or 4), pink, outer 2 orbicular, 1-1.3 cm in diam., apex with red stripes, outside sparsely pilose (hairs ca. 2 mm), inner pinkish, obovate, 0.8-1.1 × 3-5 mm; ovary broadly ovoid-ellipsoid, 3-winged, sparsely pilose (hairs ca. 2 mm), 1-loculed with parietal placentation; styles 3, ca. 2 mm, base slightly fused, stigmas spirally twisted. Capsule nodding, orbicular, compressed, 7-8 mm in diam., glabrescent, styles persistent; wings 3, equal, lunate, 1.5-2.2 mm. Fl. Mar-Jun.

                      墨线图

                      主要用途

                      模式信息

                      云南省广南县,2005-05-09, 税玉民、陈文红和张美德B2005-029 (holotype:KUN;isotypes:IBSC,KUN,PE)。

                      物种名出处

                      分布地区

                      云南省广南县,石灰岩山脚下,海拔约900米。

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