— 246 — 
long hyaline ascending higher at margins than the others; - 
costa us. excurrent. : 
VL Tortula. Leaves sometimes reflexed or limbate, gen. — 
sublingulate or sublinear, sometimes with hairpoint; basal cells — 
not higher ascending at margins. ; 
1. Cunmeifolis. Leaves smooth not limbate without hair - 
point, not or near base slightly reflexed; basal cells long. 
Stem longish. Spores about 0,015 m. m. 
2. Limbatz. Leaves papillose limbate (by several cell - 
rows, Without hairpoint, not reflexed; basal cells long. Stem — 
very short. Spores about 0,01 m. m. 3 
3. Muraliformes. Leaves papillose reflexed to above middle, - 
sometimes limbate by one cell-row, often "with hairpoint; basal 
cells long... Spores about 0,01 m. m. Stem us. short. 
4. Unguieulatz. Leaves papillose not (or only by one 
cell-row) limbate, without hairpoint, not or only below the 
middle reflexed; basal cells sometimes short-rectangular. Spores — 
about 0,01 m. m. Stem often long. ^ : 
VII. Eu-Barbula. Leaves not limbate, without hairpoint, gen. 
from dilated base acuminate, us. reflexed and not large; cells 
small us. short, the basal not higher ascending. Capsule small — 
us. oblong. Tufts us. dense. As 
1. Platyneuron. Leaves strongly revolute often nearly to — 
costa, entire and: us. spirally twisted about stem, small and d 
us. brownish; costa thick. Perichetial leaves sometimes shea- - 
thing or subconvolute. Stem low.  Dioecious. ve 
2. Streblotrichum. Leaves not: or not strongly revolute, 
not sheathing, r. denticulate. Perichetial leaves convolute. Pe- 
dicel often yellow. ut 
3. Leptobarbula. Upper (also 'perichetial) leaves sheathing 
subconvolute not reflexed. Plants small.  Dioecious. d 
. 4. Pseudo-Didymodon. Leaves gen. (not strongly) reflexed, 
r. denticulate; the perichetial not sheathing.  Dioecious. ^ 
a. Acuteformes. Leaves (at least the perichetial) with 
long-excurrent costa. MEE 
;. b. Purpurezformes. Leaves neither crisped ‘nor curved, 
small and us. red; costa gen. not excurrent. ey BOE ^ 
c. Fallaeiformes. Leaves curved us. crisped; costa i 
excurrent. Annulus of the capsule us. indistinct. Tufts gree- 
nish or rufescent. Lok 
d. Vinealiformes. Leaves curved and crisped; costa. some: 
