38 KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES. 
so { Plant ara angular cells of Is. not coloured wee. Seligeria 
Woh gs larger ; angular cells enlarged, brownish Blindia acuta 
Ls. ick ovate-lanc. w. excurrent da or v. widely ovate and 
81 imine in a bulb-like tuft; cells r Pottia 
Ls hout stiane combined Sn Sg cells close 
go! eran ts ores short, sheathing (Is. entire) ......... PASaLRSE A 
(No di I 83 
93 | Ls. rin s-green, serrul. near base, entire above ......... Eucladiuwm 
(Ls. not laos, ether serrul. above, or entire ilssinighaat: otereeeee 84 
4 / Ls. linear-lan ire, n. excurrent ; perist. t. simple ......... 
wed. a bonaadbar perist. t. m. or rl. div LAO ivivcgsiaiiey Didy ba 
* 
Porist. t. 16, Ng developed, regularly cloven about half-way into 
86 
85 2 filiform le 
Perist t. 16, divided (m. or 1. regularly) alm. to Saale or 83 Vian 90 
86! (Ls. with enlarged, usu. brownish, angular ce Dicranum 
(Ls. without special angular cells 
87 | Leaves er toed s 88 
87) Leaves smooth . 89 
gg { Caps. striate ; ie cad haben ANCE BT POPEMUMEE, TEE A, Cynodontium 
(Caps. smoo oth; ls. subsquarrose, scarcely crisped......... Dichodontium 
89 Pl. tall; 1s. acute, spreading; caps. v. strumous ......... Cynodontium 
irk small; or tall, w. v. obtuse, entire, squarrose Is. ......... Dicranella 
90! { Perist. t. 16, divided nearly to ta or 32 91 
( Perist. t. 16, less regularly divided 93 
91- ( Perist. t. s spi rally twisted Barbula 
( Peris ge not twisted 99 
(Pl. u tall; ls. dark green, opeane, von = nearly), lower “ 
92 Eoduions or sinuous, upper often bi-stra 
Leaf-cells not nodulose; Is. aie bi. store o4 
93 (Lower cells v. narrow, strongly DOGGIE vsivivessv bore. Racomitrium 
(Cells wider, aia only; per. t. usu. gon elefi Guan iG Grimmia 
94 (Caps. s' sae Surowes whee Gry* In, late: .i...6ce Ceratodon 
(Capsule not 95 
{ Capsule sik hive as long as itself. Trematodon 
~ (Capsule without elongated neck 96 
96! (Cal. mints; ts - long, tapering, m. or 1. plicate ......... Ptychomitrium 
(Cal mooth ; ls. not plicate 97 
97! (Ts. ais m. or I, sang <— glaucescent cy lané.): 4... Ditrichum 
ie i vaio, Ts oe 98 
at Perich. ls. shor gran ei t. v faa syeteiwes Dicranoweissia 
No pa periche etium; perist. t. ust. Erne: and more dey eloped 
za (Trichostom. and Didym., see under) ....s.000.e0ee0eeeeee Didymodon 
gg | Seta at end of stem, or sof ee fathers branch 100 
( Seta (with its perich. Is.) at side of stem, or of a branch ............ eee 
100 { Outer — curved Pore ; eal. inflated; cells lax ..Fun 
( Outer perist. not sie curved; cal. not inflated tieloen ened OL 
101 / Capsule orn striate, furrowed when dry 
eee ule smooth, or imolately striate .... th 
