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                      词条创建者:

                      weizhidan

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                      最近更新:2015-11-19 09:32:32

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                      weizhidan

                      2015-11-25 17:28:11

                      刘演秋海棠Begonia liuyanii
                      编辑

                      Begonia liuyanii C.-I Peng, S. M. Ku & W. C. Leongin Bot. Bull. Acad. Sin. 46(3): 245, figs. 1, 2, 3. 2005

                      种间区别

                      ——Begonia gigaphylla Y. M. Shui & W. H. Chen.
                      本种与丝形秋海棠B. filiformis Irmsch.相似,花朵小型,花序密被直硬的腺毛,差别之处在于刘演秋海棠叶片较大,上表面具有散生的刚毛,叶面全无斑纹,花序通常为聚伞圆锥状。

                      形态描述

                      Herbs, rhizomatous. Rhizomes creeping, stout, 1-2.5 cm in diam. Leaves all basal; stipules caducous, narrowly triangular, herbaceous; petiole 13-22 cm, villous or lanuginose; blade abaxially pale, adaxially green or dark green, obliquely broadly ovate or suborbicular, 23-50 × 16-40 cm, subleathery, adaxially ± nitid, sparsely setose, basally 6- or 7-veined, tertiary veins percurrent and reticulate, base deeply cordate, margin shortly ciliate, apex shortly acuminate. Inflorescences diffusely thyrsoid; flowers 13-100 in a thyrsoid cyme; peduncle 20-41 cm; bracts caducous, ovate or oblong, 1-3 × 1-2.5 mm. Staminate flowers: pedicel 0.7-1.2 cm; tepals 4, outer 2 tepals greenish yellow or sometimes reddish, 7-9 × 8-9 mm, apex rounded or obtuse, rarely acute; inner 2 tepals obovate, oblong, or lanceolate; androecium actinomorphic; stamens 30-40; filaments fused at base; anthers obovoid, apex subtruncate or subemarginate. Pistillate flowers: pedicel 1.5-2.5 cm; tepals 3, yellowish or reddish; ovary ellipsoid, 5-7 × 4-4.5 mm, glandular hispid, unequally 3-winged, 1-loculed with parietal placentation; styles 3, fused at base. Capsule nodding, 8-11 × ca. 5 mm. Fl. Apr-Sep, fr. Jun-Feb. 2n = 30*.

                      FOC

                      主要用途

                      模式信息

                      广西省龙州县,金龙镇,弄岗自然保护区,2003-9-12,W. C. Leong 3624-A (holotype: HAST; isotypes:A, IBK)。

                      分布地区

                      广西省龙州县,生长在阔叶林阴蔽处,石灰岩山坡上,海拔200米左右。

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