中国虎耳草属(虎耳草科)二新种——班玛虎耳草和丁青虎耳草(英文)

Saxifraga banmaensis and S. dingqingensis, two new species of the Saxifragaceae from China

记载了中国虎耳草属Saxifraga二新种,即班玛虎耳草S.banmaensisJ.T.Pan和丁青虎耳草S.dingqingensisJ.T.Pan。其中,班玛虎耳草仅见于青海班玛,与小伞虎耳草S.umbellulataHook.f.&Thoms.近缘,但其萼片先端具软骨质短尖头,花瓣线形,非提琴状长圆形至提琴形,基部无爪,可资区别。丁青虎耳草见于西藏丁青,与近加拉虎耳草S.llonakhensisW.W.Smith相似,但其萼片3脉,于先端汇合成1疣点,花瓣具8痂体和4?5脉,基部截形或近耳形,可以区别。此两种均系中国特有种,隶属于莲座状亚组subsect.RosularesGornall。

Saxifraga banmaensis J. T. Pan and S. dingqingensis J. T. Pan, two species of the genus Saxifraga （Saxifragaceae） from China, are described and illustrated. Of these, S. banmaensis J. T. Pan is known only from Banma County, Qinghai Province, and related to S. umbellulata Hook. f. ＆ Thorns. （including varieties）, but differs by having sepals cartilaginous-mucronulate at apex, and petals linear, not pandurate-oblong to pandurate, base not unguiculate. S. dingqingensis J. T. Pan occurs in Dingqing County, Xizang, and is similar to S. llonakhensis W. W. Smith, but differs by having sepals 3-veined, veins confluent at apex, petals 8-callose, 4-5-veined, base truncate or subauriculate. Both species are endemic to China. and belong to subsect. Rosulares Gornall.