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蕺叶秋海棠Begonia limprichtii

时间:2013-07-17 08:08来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):蕺叶秋海棠 学名( Scientific Name ): Begonia limprichtii Irmsch. 英文名( English Common Name ): 别名( Chinese Common Name ): 七星花 异名( Synonym ): Begonia houttuynioides T. T. Yu 科属( Family Genus




中文名(Chinese Name):蕺叶秋海棠
学名(Scientific Name):Begonia limprichtii Irmsch.
英文名(English Common Name):
别名(Chinese Common Name):七星花
异名(Synonym):Begonia houttuynioides T. T. Yu 
科属(Family & Genus):秋海棠科(Begoniaceae)秋海棠属
形态特征(Description):多年生草本。根状茎匍匐,节处着地生根,长圆柱状,细弱,直径2-3毫米,具有多数长短不等的纤维状之根。叶均基生,具长柄;叶片两侧不相等,轮廓卵形至宽卵形,长5-8厘米,宽4-7厘米,先端短尾尖至渐尖,基部偏斜,窄侧宽1-1.7厘米,宽侧宽2-2.5厘米,边缘有浅而疏三角形之齿,齿尖有短芒,芒长1-1.5(-2)毫米,上面褐绿色,散生直或弯的长毛,下面淡褐绿色,沿脉有短刺毛,掌状6-7条脉,窄侧2-3条,宽侧3-4条,中部以上呈羽状脉;叶柄长3-8厘米,密被褐色卷曲长毛;托叶膜质,卵状三角形,长5-7毫米,先端渐尖,无毛,早落。花葶高8-16厘米,近无毛或无毛,花少数,通常白色,稀粉红色,呈聚伞状;花序梗长1-1.3厘米,疏被毛或近无毛;苞片卵状披针形,长6-10毫米,宽2-4毫米,先端渐尖,带短刺芒,边缘被缘毛;雄花:花梗长达4厘米,被卷曲疏柔毛;花被片4,外面2枚宽卵形,长18-20毫米,宽15毫米,外面被1-2毫米长的疏柔毛,内面2枚宽椭圆形,长约10毫米,宽约5毫米,先端钝,花丝长1-2毫米,花药倒卵形,长约0.8毫米,先端微凹;雌花:花梗长约2.2厘米,被卷曲疏柔毛;花被片4-5,极不相等,外面的近圆形、宽长圆形或宽卵形,长(0.7)1.5-1.6厘米,内面广椭圆形或长圆形,长约(3) 10毫米,宽约(2)5毫米,先端钝;子房呈椭圆体,长6毫米,直径2.5毫米,被毛,2室,每室胎座具2裂片,具不等大3翅,花柱2,4-5毫米,在基部1/2长度处2分枝,柱头增粗,向外呈螺旋状扭曲,并带刺状乳头。蒴果下垂,果梗长1.5-2.5厘米,无毛,轮廓倒卵长圆形,长10-13厘米,直径7-9毫米,无毛,具不等3翅,大的舌状,长13-17毫米,宽5-9毫米,另2翅较窄,长3-5毫米,均无毛;种子极多数,长圆形,淡褐色,无毛。花期6月,果期8月。
分布(Distribution):产四川,生于海拔500-1650米的灌丛、林下阴湿处。
用途(Use):
引自中国植物志英文版FOC Vol. 13 Page 160, 182, 207     
Begonia limprichtii Irmscher, Repert. Spec. Nov. Regni Veg. Beih. 12: 440. 1922.
蕺叶秋海棠 ji ye qiu hai tang | Begoniaceae  | Begonia
Begonia houttuynioides T. T. Yü.
Herbs. Rhizomes elongate; internodes distinct. Leaves basal; stipules caducous, ovate-triangular, 5-7 mm, glabrous, apex acuminate; petiole 3-8 cm, densely brown villous; blade ovate or broadly ovate, asymmetric, 5-8 × 4-7 cm, abaxially villous, adaxially red setose, venation palmate, 7-veined, base shallowly cordate, margin remotely and irregularly denticulate, very shallowly divided, apex shortly caudate or acuminate. Inflorescences 8-16 cm tall, subglabrous or glabrous; peduncle 1-1.3 cm; bracts ovate-lanceolate, 6-10 × 2-4 mm, margin ciliate, apex acuminate and shortly cuspidate. Staminate flowers: pedicel ca. 4 mm; tepals 4, white or rarely pink, outer 2 broadly ovate, 1.8-2 × ca. 1.5 cm, abaxially pilose, inner 2 broadly elliptic, ca. 10 × 5 mm; filaments 1-2 mm; anthers obovoid, ca. 0.8 mm, apex emarginate. Pistillate flowers: pedicel ca. 2.2 cm; ovary pilose, 2-loculed; placentae axile, bilamellate; tepals 4 or 5, unequal, largest suborbicular, broadly oblong, or broadly ovate, 1.5-1.6 cm, smallest oval or oblong, (3-)10 × (2-)5 mm; styles 2, fused to halfway; stigmas 2-cleft, spiraled. Capsule nodding, obovoid-oblong, 10-13 × 7-9 mm, unequally 3-winged; abaxial wing ligulate, 13-17 × 5-9 mm; lateral wings 3-5 mm. Fl. Jun, fr. Aug. 2n = 22*.
● Mountain slopes; 500-1700 m. Sichuan, Yunnan.
This species is similar to Begonia ruboides but differs by its very shallowly lobed leaf blade and 2-loculed ovary.
(责任编辑:徐晔春)
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