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团扇秋海棠Begonia leprosa

时间:2013-07-17 08:06来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):团扇秋海棠 学名( Scientific Name ): Begonia leprosa Hance 英文名( English Common Name ): 别名( Chinese Common Name ): 癞叶秋海棠 异名( Synonym ): Begonia bretschneideriana Hemsl. 科属( Family Genus )




中文名(Chinese Name):团扇秋海棠
学名(Scientific Name):Begonia leprosa Hance
英文名(English Common Name):
别名(Chinese Common Name):癞叶秋海棠
异名(Synonym):Begonia bretschneideriana Hemsl. 
科属(Family & Genus):秋海棠科(Begoniaceae)秋海棠属
形态特征(Description):多年生草本。根状茎粗壮,直径(5-)8-10毫米,表面凸凹不平,结节状,有残存褐色之鳞片,节处常生出长匍伏枝和多数纤维状根。叶均基生,具柄;叶片两侧极不相等,轮廓近圆形,或宽卵圆形,长4-8厘米,宽4.5-9厘米,先端圆钝,或急尖至短尾尖,基部偏斜,心形,窄侧宽1-2.3厘米,呈窄圆形,宽侧宽2.3-5.3厘米,呈圆耳锤状,边缘有细密微凸起之齿,幼时齿尖带芒,芒长0.5-1毫米,老时枯萎,上面褐绿色,有白斑,下面色淡,沿脉被锈褐色卷曲长毛,近叶柄处较密,两面密被细小下陷圆形窝孔,掌状5-7条脉,直达叶缘,窄侧2条,宽侧4条;叶柄长4-9.5厘米,有棱,幼时密被锈褐色卷曲长毛,老时减少;托叶膜质,卵形,长约5毫米,先端有长芒,早落。花白色或粉红色,2-5(-7)朵,花序梗长约2厘米,被疏毛;雄花:花梗长6-11毫米,被疏毛或近无毛,苞片膜质,卵形,长5-6毫米,边有缘毛;花被片4,外轮2枚宽卵形,长约7-9毫米,宽约8-10毫米,先端圆,内轮2枚长圆形,长5-7毫米,宽约3毫米;雄蕊多数,离生,花丝长1-1.2毫米,花药长倒卵球形,长约1.2毫米,先端微凹;雌花:近无梗;苞片膜质,卵形,长3.5-5毫米,边 有缘毛;花被片4,外轮2枚倒宽卵形或近圆形,长7-9毫米,宽8-9毫米,先端圆,内轮2枚倒卵长圆形,长5-7毫米,宽约3毫米,先端圆;子房长圆形,3室,每室胎座具2裂片;花柱3,离生,中部以上分枝,柱头呈螺旋状扭曲,并带刺状乳突。蒴果下垂,梗长1.2-1.5毫米;轮廓纺锤状,长1.2-2厘米,外面有圆形窝孔,无翅;种子极多数,椭圆形,表面有窝孔。花期9月,果期10月开始。
分布(Distribution):产广东、广西,生于海拔700-1800米的林下、路边或山坡的湿润地或湿岩石上。
用途(Use):
引自中国植物志英文版FOC Vol. 13 Page 156, 182, 206
Begonia leprosa Hance, J. Bot. 21: 202. 1883.
癞叶秋海棠 lai ye qiu hai tang| Begoniaceae  | Begonia
Begonia bretschneideriana Hemsley.
Herbs, creeping. Rhizomes 5-14 mm in diam. Leaves basal; stipules caducous, ovate, (5-)15-23 mm, membranous, apex cuspidate; petiole 4-13 cm, glabrous to densely brown villous when young; blade sometimes very shallowly peltate, suborbicular, obovate, or broadly ovate, asymmetric, 4-15 × 4.5-21 cm, abaxially glabrous to brown villous, adaxially glabrous, venation palmate, 5-7-veined, base oblique, cordate, margin remotely and minutely serrulate, apex acute or shortly caudate. Inflorescences usually reduced, 1-1.5(-7) cm; bracts ovate, 3.5-15 mm, membranous, margin ciliate. Staminate flowers: pedicel 2-8 mm, glabrous to sparsely villous; tepals 4, white to pink, glabrous, outer 2 abaxially reddish on veins, broadly ovate, 7-26 × 8-29 mm, inner 2 oblong, 5-27 × 2-9 mm; stamens 21-78, free; filaments 0.6-3.8 mm; anthers obovoid to subglobose, 1.1-2.6 mm, apex emarginate. Pistillate flowers: pedicel 4-20 mm; tepals 3, white to pink, glabrous, persistent in fruit, outer 2 abaxially reddish on veins, broadly obovate or suborbicular, 7-18 × 8-18 mm, inner 1 obovate-oblong, ca. 7 × 4 mm; ovary glabrous, 3-loculed; placentae axile, undivided or bilamellate; styles 3, free; stigmas 2-cleft, spiraled. Fruit pendulous, clavate, 1.1-2.2 cm, wingless. Fl. May-Sep, fr. Jun-Oct.
● Semiopen forests or scrubby vegetation, on limestone rocks; 100-800 m. Guangdong, Guangxi.
This is a common species.
(责任编辑:徐晔春)
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