异名：Elatostema filicaulum C. B. Clarke (synonym)、Elatostema obtusum Wedd. var. glabrescens W. T. Wang (synonym)、Elatostema trilobulatum (Hayata) T. Yamaz. (synonym)、Pellionia trilobulata Hayata (synonym)

Elatostema obtusum Wedd. var. trilobulatum (Hayata) W. T. Wang in Bull. Bot. Lab. N.-E. For. Inst. 7: 66. 1980. ——Pellionia trilobulata Hayata in Journ. Coll. Sci. Univ. Tokyo 30 (1): 280. 1911; Ic. pl. Formos. 6: 56. 1916; Liu et Huang in Fl. Taiwan 2: 205. 1976. ——Elatostema trilobulatum (Hayata) Yamazaki in Journ. Jap. Bot. 47 (6): 180, f. 1. 1972.

与钝叶楼梯草的区别：茎被极为稀疏的反曲短毛；叶长圆状倒卵形，顶端每侧近顶 部各有1齿，偶尔宽侧顶端有2齿，较小，长0.5-1.2厘米。

产台湾。生于山地，海拔700-1 600米。