188 KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES. 
Caps. cernuous, smooth or substriate only 6 
51 Cape erect, striate, suleate when d crispa 
oft entire; caps. substriate, substrumous at neck.... eerevein See enor ana 
Ls. serrul. at apex; caps. smooth, equal at nec Schrebert 
. {Genes een striate, sulcate when dry; Is. slightly sheathing ..............00++ 8 
Caps. sm ooth: Is. not sheathing 9 
816 aps. cernuous; Is. entire; perch. Js, sheathing subulata 
Caps. erect; 1s. subserrul. a ; per. ls. sc. sheathing ...... sehen 
“thew ros at ‘< entire, cht patent or subsecund ...... aria 
91 Gaps suberect; Is. secund, serrul. at apex; cells wider ...... fifiibcna 
DICRANOWEISSIA, 
1 Ls. lanceolate-subul., paapic AES gia oes oval ...... crispula 
Ls. os w. shorter ute 2 
Ls caps. subcylindric; perist. t. oe rrha 
ats. Aistantty tot ty at apex; sabe. oval- ae cane ‘ecth smal 
y ¢. Ont 
DICRANUM. 
Pl. rooting at base only, small (exe. molle); monoicous...... ay 
1 {Se rai pean pee pl. often lees are ee (the male plant being often 
nestling in the to: 
9{/C aps. su ste ect, pak ge eee st ied seta short ..... Gatti 
(Caps. cernuous, neck strumulose when ripe; seta longer ...........+... 3 
3 (Pl. 2—6 in.; ls. eee glossy one: oblong-cylindric......++.+++ sees 
| Pl. 3—2 in in. high; ls. shorter and less silky 
4 Ls. flexuoso-patent; male a. far ie perichetium.............. hae 
{ts falcato-secund ; a flower close ee perichetium 
5 | Ls. w. few angular caps. short, obov leatum 
5 | Angular cells ‘istinet, es caps. Si aa tiesinnee Star 
6! Ls. Seanevernely undulate Id cernuous, curved) 
6 i Ls. n not transversely undu io 
: Ls. w. upper ‘cells long we narrow 8 
Upper cells short, m. or 1. quadrate or irregular 9 
8! Pl. firm; Is. Regent w. long ee. teeth above ...... ye an 
ee weak, ls. w. saw-like teeth near SPOR WING Gcsisssscsss se Bon; 
g { Ls. tapering ‘0! rt obtuse Soest not papillose Bergeri 
tia r, suddenly e, papillose at the back of apex ...... spurvum 
10 Ls. suddenly narrow: aes near base to aod setaceous points ........... ll 
\Ts Ls. gradually tapering to subulate p 13 
11 | Ls: serrate above base, subula since mm back. esseeesermrees asperulum 
(Ls. w. basal wing entire, usu. falea und 12 
12 { Nerve } of cael of leaf, subula oe at ASR matum 
N. 4—+4 of base, serr. at back; Is. pale 8 OU isi ccekiserscevs sieeapollons 
13! (Ls. entire, or serrulate at tetas apex only .. 14 
\ Ls. distinctly serrul. above (caps. ceratons exc. ». tuontanum) wiatke 38 
(Ls. faleato-secund (variety curvulum o! —, 
sa (Ls. patent or subsecund “ 
Pl. small; Is. entire wegen * all broken across... merle 
151 T6, not fragile; pl. usu. ‘ « taller 
1g {El long, slender, w. dense tomentum: caps. cernuous ...... atum 
16} py, less compact; Is. m. or 1. signs — dry; caps. eree savers 
17 { Plant under 1 in.; Is. serrulate at dav sas oasepeuerbas uel . flagellare 
\ PL. taller; Is. entire, only slightly fouted when dry vss. Seottianum 
