900 KEY 10 THE GENERA AND SPECIES OF BRITisH MossEs; 
4! {ts Ls. gowns Ww. eee — on surface, v. papillose *... ehayallge 
5 { Ls. ta sasha be o serrulate te hyaline POMS, 45> <ovessevvesness +++ diaphanum 
(Ls. without hyaline 6 
g { Caps. — Drizcanee ra or striz letocarpum 
Capsule 7 
- Caps. eae ga immersed below Sac vate cells 8 
Caps. imm mersed (or emergent w. superficial stomata) 10 
8 Perist. double, t. reflexed when dry; ls. r. ¢ awed gus een 
Perist. usu. single, teeth erect when mae Pi POG CEIBOOE iio eeeesresv ds 9 
ivere: subcylindric, 16-striate; perist. t Siac 
cylindric, usu. 8-striate 3 t. often aa’ in 8 saxatile 
10! Case: 16- striate ; perist. single oe a veqeeg oes cupulatum 
10 | Caps. 8 8-striate; perist. usu. double (exc. Shaw) 1 
Perist. t. erect Wiis dry (stom. wipe ); on rocks and walls ...... 12 
— t. t. reflexed when dry; on trees, or sometimes on rocks ...... 13 
| Caps. pon ame, Fe t base; Is. usu. of single layer rupestre 
21 Caps unded at Mec ls. of double layer of cells Sturmit 
aio nk opaque w. dense papille; stomata superfic. 14 
3 | Perist. t. yellowish, v. finely papillose; stomata immersed.........++. 17 
4 Perist. single; caps. v. faintly striate below mouth only ...... ae v 
Perist. double caps. distinctly striat 
15 { Cavs: r 1, emergent, striate in upper half speciosum 
51 Ca aps. “inated stron ngly striate in whole length 16 
1g / Ls: Pa tulous, coarsely papillose, cells rounded 
Ls. shiek; s sc. papillose, cells hexagonal; pl. denser ...... fi see lke 
17 { Vaginula very? hairy 18 
(Vag acinula nak 
19 
18 {Ste of caps. strong, of 4 oa of cells straminewm 
St of ca caps. fain t, of 2 ro s only patens 
9! Caps. short, sharply contracted, to the pedicel........ Pissesssesss0s,f OOS 
19) Ga aps. elo ia gradually tapering to the Ate el 20 
go { Caps. subcylindrie ; alate conic, with few hai tenellum 
(Caps. oval-oblong; calyptra saniiguaiiaa aed eles avai’ ..- pallens 
PHASCUM. 
1 tone Caps. — cuspida tum 
2 
a! (Seta arcuate caps. roundish-ovate, without lid .......... te epyaeace 
— emia ; caps. with a minute, persistent lid 
3! Caps. subglobose ; ealyptra rough at apex rectum 
(Caps. elliptic, acuminate; calyptra smooth.................00....b7yotdes 
PHILONOTIS. 
1 pe m }—} i erat inner perist, sometimes imperfect..................rigida 
Stem over 1 in. 9 
Ls. w. plane margins, ovate-lanc., ta cells large......... le 
2| Maric m. or ss se reflexed, cells smalle 8 : St ise 
Ls. wide-ovate, — at apex, usu. rie ~ Nib segeus 
airs. ovat hs ovate-lanc., acu od cumin beater eres 
ate spiral mpi on cells ek r. obscure 
Ls. i ne secund, or spreading, cells larger below .. sae 
_PHYSCOMITRIUM, 
{ Ls. serrate above; ea, isti 5 
Pte be i 3 Caps. w. distinct neck ctecncceectscseenctcveeeDYUPLLOTME _ 
mq entire; caps. without neck, wide-mouthed ........ iit 
