KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES. 41 
145 i fitigalate or oblong 146 
Ls. ovate, obovate, or roundish ......Funariacee and ee 
146 Ue obtuse, entire sodon 
Ls. acute, usu. serrulate at a ra ap bictbedtheviedsoueein ambigeden 
apt: — ly squarrose, v. obtus Dicranella 
147 \ tak are sh acoadl y ae 4 148 
148 (Ls. “obtuse, ne es ea w. flat Meesia 
(Ls rl. ac cells w. peo ends 149 
Ls. Waly ovate, v. ects ; cells lax...... Zieria and Bryum argent. 
149; Ls. usu. lanc.; n. be inert apex Webera 
usu. m. edt teat n. usu. to apex or excurrent........2+06. Bryum 
150 flan serrate a 151 
| Leaves entire, or Pal toothed near apex only 159 
151! Ls. ret = a — ml, W. AX sescnssasee Mnium stellare 
(Cells close, rarely hexa 152 
152 Leaves more or less squarrose 153 
Leaves not squarrose 157 
153 ie Ls. shortly and widely ovate, acute, v. much recurved...... Paludella 
- more or less oblong or lanceolate 154 
ee obtuse, or subacute only, sialiaeky papillose......... weoaaayirgeee 
154\ acute, finely papillose 
{ Ls. v. acumin., w. basal margin of hyaline clas arbule spear 
155 - ais 
(Ls. w. shorter, less tapering poin 156 
Ls. r. coarsely eroso-serrate; upper cells a voeseasee-Didymodon 
156 {5 Fo serrate; upper r cells dot- HS i aki ZLygodon Nowelliz 
157 Epehies open ert Renan a) Pelidissis csrdccewenss memes 
158 { Ls. euarsely pam when dry ...... 7 
Ls. finely serrate, usu. Palioes o atone, seer os gepeeee pmidvadinia 
159 / Ls. broad, oblong or spate, obtuse or w. excurrent n. wagered 
| Ls. narrow, lanceolate 
160 | Ls: opaque above: as 3 ense, m. or I. quadrate 161 
(Cells rounded, clear, incrassate, less dense 163 
(Ls. large, oblong, usu. obtuse, ue w. shortly excurrent nerve; with 
161 v. large multi papille abov Encalypta 
Ls. smooth o smaller meth or else w. hair-points ............ 162 
162: ‘Giieas v. elong ke, PRE ls. w. thickened border ...... Cinclidotus 
(Stem less elongate, usu. terrestri rbul, 
163 Ag dull-green; Js. smooth or finely papillose ......... Orthotrichum 
| PL. pale green; cells ‘sak conically prominent .........2 Aulacomnium 
164 { Upper ls. tipped w. clustered gemmez Ulota a ervenens 
(Ls. not tipped with gemme in clusters 65 
165 { Ls- sas bE margin recurved, at least in lower half......... 166 
(Ls. usu. linear-lanc., margin alm. plane or incurved ...............168 
166! Ls. long, dark-green, ,opagne, is con or subacute ...... Orthotrich: ei 
(Ls. acute, or short and s 
167 Pl. v. red below oe Tied een w. short wide leaves...... ibpubiins 
ey green or red- pte nb elow; Is. usu. lane. ...............Barbula, &e. 
168! { Ls. glaucous-g or cine serrate near base, entire above......... Eueladium 
es aves entire belo 169 
169! w. basal hya cells ascending up margin of leaf............. ..170 
| Boual hyal. walla at shied) not ascending up margin...........++++ 171 
