KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES. 197 
5 {8 Is. ree, opens: ovate, closely imbric., usu. ,orved we Tent 
s 
t. ls. m. or 1. triangular, not or loosely imbric., 2 NOFVOG. | sepvepveosed 
6 {3 St. Is. loca ves at base, coarsely serr.; lid conic ..........+s 
St. ls. w. rounded base, ei serrate ; lid hisked water ve py isto re 
psp sensi 
1 with pla 2 2 
ies with involate ars 3 
2 aps. alm. immersed; seta sc. } line 1 eae ite a 
Seta beats ws ls. enna: rose; st. iiapaobort below ...-. ereceens squarrosum 
3 CL slightly branched; Is. narrow, twisted when dry ...microstomum 
Pl. much branched; Is. dense, wider, incurved when dry ......tortile 
NUM, 
,{Ls. acute or acuminate 
ifr m. or l. obtuse or apiculate 83 
9 { Nerve single (occasionally yer at the end) 3 
(Ls. nervele: shortly 2-n 20 
3 | Ls. shrine rugose ; neal selliea rugosum 
(Ls. not transversely rugose 4 
4 | Ls. not plicate rel moist ni — striate only) 5 
(Ls. distinetly plicate when 15 
5 | Ls. squarrose or oh spreading ‘aetiities also subsecund)...........++06 6 
5 Le. distinctly se 8 
6 { St. Is. vanmenndaeellie n. ceasing about t half- — ...chrysophyllum 
Ls. lanceolate-acumin.; n. longer; growing in Ob Places ..ccccsesss. 
Ls. with v. narrow vet Hottoninnetinde ender ...... elodes 
7h. with shorter acumen on . alti bale pl ln ee 
rome: tomentose; e thick, usu. aa BPOR Siicieiasileicn wet goes 
Stone-nie tulniatius? hs nerve not reaching apex 
| Ls. soft and flaccid, w. short, usu. stig acumen; plant atte: on 
9 rocks, &c., in streams 43 
Ls. w. long, fine-pointed Spe: sai aes 10 
10 {1 gp (or searcely auricled re | 
1011s angular cells e: siaraees m. orl. (eet auricled ....... scesede 
11! cn cous; subpi promos! * crowded, circinate ............... revolvens 
= ioicous; robust, p ; 1s. wider, faleato. secund Cossoni 
Angular cells ncaa yelowtilis pl. robust Sendtneri 
12} Aneicles hyaline; plant usu. less robust 13 
18 leonale absent; salle v. eo n. almost reaching see wedoidsuects 14 
Annulus wide; dio oicous; Is. secund, n. shorter .........e.0.0 aduncum 
14 {Moni ls. faintly striate, Sle tocun he” Siecle ekcs .e exannulatum 
Monoicou te st. - flexuose, only the upper ones secund esse fluitans 
15 ‘See us paraphyllia, w. or without radicles ......... severe LG 
Sap witha ah or radicles ......, 18 
16 St. v. arn ie st. ls. deltoid, bi-auriculate............... ihe 
Stem not or se. radiculose; st. Is. ovate at base 
17 Es robust; n. "hi ck, alm. to apex; Is. m. or 1. faleate.........faleatu 
Pl. weak; nerve slender, usu. about half. -way ; ls. hamulose iy ae ern 
18{ Le aa evration w. the cea v. ~ pl entir 6% vedesete Iycopoiliotie’ 
wer; plant no t turgid; s m usu. hooked above issisnlD 
g/Ls especially at apex, crate, cireinate ...... unecinatu 
gg wideeas pr apex, se. serrulate, purple along base ....... .-vernicosum 
Ls. v. widely ovate or pret ot soft, w. aie points........-......4B8 
Ls. ovate or lanceolate, wi 21 
201 
