西藏自治区墨脱县一种钗子股属植物考订

Examination and Correction of a Plant of Luisia in Medog County,Tibet Autonomous Region

通过对活体植物、标本以及文献的研究,本文对西藏自治区墨脱县海拔850~1000 m区域分布的一种钗子股属植物进行了考订,证实了短穗钗子股Luisia trichorhiza (Hook.) Blume在中国的确定分布。研究认为:(1)该种钗子股属植物系《西藏植物志》中收录的短穗钗子股Luisia trichorhiza (Hook.)Blume,是短穗钗子股在中国的再次发现。(2)该种钗子股属植物花瓣长圆形,0.6×0.3 cm,与长瓣钗子股(L.filiformis Hook.)差异明显,NSII与CVH为鉴定错误;(3)印缅钗子股(L.zeylanica Lindl.)叶较茎细,花小,唇瓣深紫色;短穗钗子股者叶与茎等粗,花更大,唇瓣具绿色条纹。根据已发表文献中提供的西藏自治区墨脱县之印缅钗子股形态解剖图,应是短穗钗子误订。

This study presents a comprehensive investigation involving living plants,herbarium specimens,and relevant literature to reassess a species within the genus Luisia Gaudich.,distributed at an elevation of 850 ~ 1000 m in Medog County,Tibet.The research confirms the definite distribution of Luisia trichorhiza(Hook.) Blume in China.Key findings include the rediscovery of this species in China,as previously recorded in the "Flora of Xizang.".Furthermore,distinct morphological differences between Luisia trichorhiza(Hook.) Blume and L.filiformis(Hook.) are highlighted,leading to the conclusion that the latter identifications,NSII and CVH,were erroneous.Additionally,morphological disparities between L.zeylanica Lindl.and L.trichorhiza,including leaf and stem thickness,flower size,and lip coloration,further support the distinction between these two species.The anatomical photo of L.zeylanica collected from Medog County,Tibet,provides compelling evidence for the misidentification and should be attributed to L.trichorhiza.