荨麻科楼梯草属植物瘦果的补充描述（英文）

Supplementary description of achenes of Elatostema(Urticaceae)

楼梯草属植物的瘦果具有较高的形态多样性,可作为种类鉴定的重要依据。然而,中国超过半数楼梯草属植物缺少瘦果形态信息。该研究通过野外考察、标本查阅以及光镜和扫描电镜的观察,对七种楼梯草属植物的瘦果进行了补充描述,并提供了墨线图和照片。该研究结果对该属的进一步分类修订提供了有价值的信息。

The achene of Elatostema owns high morphological diversity indicates its usefulness in delimitation. However, over half of Chinese species are lacking of achene information. In this paper, based on our field collection and specimen checking by light microscope （LM） and scanning electron microscope （SEM）, we supplement the description, illustration and photos of achene of seven species that would provide valuable information for further taxonomic revision in this genus.