关键词: 荨麻科, 楼梯草属, 新种, 变种, 新记录, 补充描述, 具肋瘦果

Abstract: (1)Two species of the genus Elatostema(Urticaceae), E.villosistipulum and E.longgangense, are described as new from Guangxi Autonomous Rejion, and the diagnostic differences between them and their allies are given respectively; (2)E.lineolatum var. integrifolium is newly recorded to the flora of China; (3)The descriptions of pistillate capitula, pistillate flower and achene of E.brevipedunculatum and E.lineolatum var. integrifolium are given for the first time; (4)The time of occurrence of the ribbed achenes peculiar to the genus Elatostema is briefly discussed.

Key words: Urticaceae, Elatostema, new species, variety, new record, supplementary description, ribbed achene