云南薯蓣Dioscorea yunnanensis Prain et Burkill
云南薯蓣Dioscorea yunnanensis Prain et Burkill
20. 云南薯蓣（中国高等植物图鉴）图版24: 1-2
Dioscorea yunnanensis Prain et Burkill in Journ. Asi at. Soc. Bengal 73 (2): 186. 1904, et n. s. 10: 17. 1914; R. Knuth in Engl. Pflanzenr. 87(4-43): 317. 1924; Hand. -Mazz. Symb. Sin. 7: 1241. 1936; Prain et Burkill in Ann. Bot. Gard. Calcutta 14(1): 101, pl. 42. 1936; 中国高等植物图鉴 5: 562, 图7953. 1976.
缠绕草质藤本。块茎长圆柱形，垂直生长，断面白色。茎左旋，密被灰白色曲柔毛。叶片肾状心形或圆心形，长7-15厘米，宽10-18厘米，顶端凸尖，基部心形，表面几无毛，主脉明显，背面密被灰白色曲柔毛，叶脉9-11条；叶柄长5.5-10厘米，密被灰白色曲柔毛。花单性，雌雄异株。雄花3-5朵组成小聚伞花序，若干小花序稀疏排列在花序轴上形成穗状花序，密被曲柔毛；花被裂片三角形或卵状三角形；雄蕊6，花药背着，内向，花丝与花药近等长，着生在花被裂片基部。雌花序穗状，单生叶腋，长约11厘米，密被曲柔毛，花疏生。蒴果反折下垂，三棱状长方形，密被或疏被灰白色曲柔毛，易脱落，长2.5-3厘米，宽1.5-2厘米，边缘深波状，顶端及基部凹缺；种子2枚，着生于每室中轴中下部，有时1枚不发育，种翅薄膜质，向蒴果顶端延伸成宽翅。花期7-8月，果期9-10月。
产贵州、云南。生于海拔1300-1500米的林缘或向阳山坡的灌木丛中。模式标本采自云南蒙自。
《Flora of China》 Vol. 24 (2000)
Dioscorea yunnanensis Prain & Burkill
云南薯蓣 yun nan shu yu
Tubers vertical, cylindric; transverse section white. Stem twining to left, grayish woolly pubescent, glabrescent. Leaves alternate, simple; petiole 4--11 cm; leaf blade reniform to orbicular, 7--15 × 10--18 cm, adaxially glabrescent, abaxially densely pubescent, basal veins 9, prominent, base shallowly to deeply cordate with narrow sinus, apex shortly acuminate. Male thyrse solitary, to at least 10 cm, grayish to tawny tomentose. Male flowers: in pedunculate, ± 1-sided, dense cymules of 3--5; perianth lobes ovate- or oblong-triangular, ca. 2 × 1 mm; stamens 6, inserted at base of perianth lobes, filaments nearly as long as anthers, anthers dorsifixed, introrse. Female spikes 9--27 cm. Capsule reflexed, oblong, 2.5--3 cm, densely pubescent, base cordate, apex emarginate; wings 0.8--2 cm wide, strongly undulate. Seeds inserted near base of capsule, sometimes only 1 fertile; wing pointing toward capsule apex. Fl. Jul--Aug, fr. Sep--Oct.
* Scrub forests, forest margins, mountain slopes; 1000--2800 m. Guizhou, Yunnan.
别名：云南粘山药;滇黏山药;云南黏山药;
科名：薯蓣科 Dioscoreaceae
属名：薯蓣属 Dioscorea
20. 云南薯蓣（中国高等植物图鉴）图版24: 1-2
Dioscorea yunnanensis Prain et Burkill in Journ. Asi at. Soc. Bengal 73 (2): 186. 1904, et n. s. 10: 17. 1914; R. Knuth in Engl. Pflanzenr. 87(4-43): 317. 1924; Hand. -Mazz. Symb. Sin. 7: 1241. 1936; Prain et Burkill in Ann. Bot. Gard. Calcutta 14(1): 101, pl. 42. 1936; 中国高等植物图鉴 5: 562, 图7953. 1976.
缠绕草质藤本。块茎长圆柱形，垂直生长，断面白色。茎左旋，密被灰白色曲柔毛。叶片肾状心形或圆心形，长7-15厘米，宽10-18厘米，顶端凸尖，基部心形，表面几无毛，主脉明显，背面密被灰白色曲柔毛，叶脉9-11条；叶柄长5.5-10厘米，密被灰白色曲柔毛。花单性，雌雄异株。雄花3-5朵组成小聚伞花序，若干小花序稀疏排列在花序轴上形成穗状花序，密被曲柔毛；花被裂片三角形或卵状三角形；雄蕊6，花药背着，内向，花丝与花药近等长，着生在花被裂片基部。雌花序穗状，单生叶腋，长约11厘米，密被曲柔毛，花疏生。蒴果反折下垂，三棱状长方形，密被或疏被灰白色曲柔毛，易脱落，长2.5-3厘米，宽1.5-2厘米，边缘深波状，顶端及基部凹缺；种子2枚，着生于每室中轴中下部，有时1枚不发育，种翅薄膜质，向蒴果顶端延伸成宽翅。花期7-8月，果期9-10月。
产贵州、云南。生于海拔1300-1500米的林缘或向阳山坡的灌木丛中。模式标本采自云南蒙自。
《Flora of China》 Vol. 24 (2000)
Dioscorea yunnanensis Prain & Burkill
云南薯蓣 yun nan shu yu
Tubers vertical, cylindric; transverse section white. Stem twining to left, grayish woolly pubescent, glabrescent. Leaves alternate, simple; petiole 4--11 cm; leaf blade reniform to orbicular, 7--15 × 10--18 cm, adaxially glabrescent, abaxially densely pubescent, basal veins 9, prominent, base shallowly to deeply cordate with narrow sinus, apex shortly acuminate. Male thyrse solitary, to at least 10 cm, grayish to tawny tomentose. Male flowers: in pedunculate, ± 1-sided, dense cymules of 3--5; perianth lobes ovate- or oblong-triangular, ca. 2 × 1 mm; stamens 6, inserted at base of perianth lobes, filaments nearly as long as anthers, anthers dorsifixed, introrse. Female spikes 9--27 cm. Capsule reflexed, oblong, 2.5--3 cm, densely pubescent, base cordate, apex emarginate; wings 0.8--2 cm wide, strongly undulate. Seeds inserted near base of capsule, sometimes only 1 fertile; wing pointing toward capsule apex. Fl. Jul--Aug, fr. Sep--Oct.
* Scrub forests, forest margins, mountain slopes; 1000--2800 m. Guizhou, Yunnan.