5b. Plagiothecium formosicum var. rectiapex D.-K. Li 台湾棉藓直叶变种 tai wan mian xian zhi ye bian zhong
Acta Phytotax. Sin. 19. 2: 266. 1981. Type: China. Xizang, Jia-li (Ba-ga) Co., M. Zang 1965 (holotype HKAS).
Plants slender, soft, bright green, glossy. Stems irregularly branched. All leaves asymmetric, shortly ovate-lanceolate, slightly curved at apex, narrowly decurrent at base; margins entire; costae short, forked, unequal in length; median leaf cells narrowly rhomboidal; basal cells lax; alar regions decurrent, consisting of 2 rows of rectangular cells. Brood bodies hyaline, present at leaf apex. Sporophytes not seen.