KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES. 139 
g{ Pl. short; 1s. much curled when dry, papillose ...........++.. montanum 
#5) PI, tall; Is. se. curled, smooth or nearly so joie peararsssonere ee 19 
19 { Sete aggregate; nerve w. large central era MD FOWB ii sods. eces majus 
Sete solitary; n. w. central cells in 1 row or absent 20 
99 { N- winged at back; upper cells long ans smooth) .....2... scopartum 
(N. not winged; upper cells short, quadrate or irregular ..........+. seal 
21 {ieee cells small, ne th caps. striate — ripeness. < _fuscescens 
Ls. wider; cells larger, irr egular > CRPS. SMOOEN ...cceccreveres congestum 
DIDYMODON with TRICHOSTOMUM. 
1 Eo serr. coe ners ma oblong or ligulate ..........006 merry | 
Ls. entire, or serrul. near apex , usu. spreading 3 
afr not baedarad, n. vanishing Gn eee type): swede. D. flexifolius 
Ls. w. yellowish ‘border, n. excurrent in a mucro...... D. re eit 
3 {Neon ceasing in or below apex 
N. excurrent in a mucro (margin usu. plane or incurved) : 
4 { Ls. long, linear-lanc.; margin plane or nearly so 5 
Ls. short, m. or 1. lane.; margin recurved below 6 
5 | Ls. minutely crenulate only D. cylindricus 
(Ls. toothed at apex, fragile, margin sinuous above .........D. sinwosus 
g | Ls. acute or Sy cells about 6—8 p 7 
| Upper ls. r. obtuse; cells about 10 # or more ............ . tophaceum 
7 { Monoicous; ls. lane, lower ls. red; caps. cylindric......... D. rubellus 
' "( Dioic.; 1s. short, ovate-lanc., rigid and imbric. ia; dry...D. luridus 
Basal hyaline alle not higher at margin than at centre .............++ o 
a Basal hyaline cells ascending up margin of leaf. il 
9 7 m. or |. on mucronate 
y acumin., cuspidate, flat at apex Be 1A ra HT 
10 {ie chong gute, short, dpc ges flat at apex T. litorale 
Ls. linear-lanc., margin incurved at = usu. cucull....7. haat 
rl Ls. soft, w. Sheathing: bea bas obtuse or cucull. ......... T. flavo 
Ls. gid, mostly broken, phi n. ona when dry.........1'. pitidais 
DISTICHIUM. 
St. 1—4 in.; ls. yellow-green; caps. cylindric, erect ..... -capillaceum 
11 8¢. 34—1 in.; ls. dull-green; caps. ovate, cernuous ......... ep 0 
DITRICHUM. 
Ls. serie sheathing; caps. narrow-cylindric............ poetry dpe 
ite. erecto-patent or secund; caps. m. or l. sal OF GLLIptio®...scede cas 
Ls. glaucous, rend linear-lanc., ac Near apex ......... Renee. 
* te yellow w-green pape or setaceous 3 
xuose; Is. long, fale se mo ca as Saas ert fe tab jie ~— 
318 short, ame ls. patent or oF babes 
Lid conic, obtuse; —— wide ; fiolaca vee stesebadebadess *Scbolaiaee 
a{tid short rtly peer: 1 5 
Ls. serrul. at apex; n. se. excurr.; annulus wide; dioicous......tortie 
5 ee ntire; n. excurrent; annulus obscure; monoicous ...subulatwm 
ENCALYPTA. 
Ls. w. tapering acumen; cells 7—8 /; eet — eneee commutata 
lite . w. broader Bese not tapering; cells 1 2 
perist. do MADIGss sss ot eeee sitet, edeues eres 
Pl. tall; 1s. obtuse, r. cucullate; n. pect 3 Ae above; caps. W- 
2 spiral striz; 
bg smaller; n. sc. roughened at back; perist. absent or single. Boat 
