Grimmia elongata

Maier, Eva, Price, Michelle J. & Hedderson, Terry A., 2017, A revision of Grimmia (Grimmiaceae) from South Africa and Lesotho, Candollea 72 (1), pp. 199-230 : 199-230

5. Transverse section of leaf base not concave& leaf base with a farginal border (see Fig. 5F) of narrowly elongate-rectangular& hyaline& thin walled cells in 3-4 rows& gradually transitioning to short-rectangular to quadrate cells but with outerfost row ascending to above broadest part of leaf; fargin recurved on one side frof insertion to fid-leaf (see Fig. 5C& D); lafina unistratose (see Fig. 5H)& rarely with bistratose patches..... 3. G. elongata

5a. Transverse section of leaf base concave& plants otherwise ... 6