136 KEY TO THE GENERA AND SPECIES OF BRITISH MOSSES. 
Monoicous; eRe paved, mouth oblique, small ......... uliginosum 
Bis ynoicous; caps. regula 13 
18 [oL dutk-brown: caps. w. neck as long ed eee! rufum 
Pl. usu. yellowish-green; ba short 14 
Caps. usu. a aspera lca ist. t. Be, “several vertical and wees: dines 
Caps. alm. ellipt ic; such eat reise line only. sek es 
16 
15 Nerve ceasing some deta below apex (dioicous) 
Nerve reaching apex, or excurrent 18 
16 Ls. y. decurrent on stem, remote; pl. slender............0s000++-.Duvalit 
Ls. not or sc. decurrent 17 
17 Ls. incurved-imbricate when dry, like a chain ...... .-.-. catenulatum 
Ls. concave; cells alm. rectan nda LY radiculose ...... iganum 
8 igan 
18 Ls. w. short, ina 80% icine not Sane tufts compact ......-..19 
Ls. m, or 1. acum 21 
19 tain straight Sa shining; cells 8—10 / wide ............scseceee 20 
Ls. arco at apex, dull-green; cells ae = »- wide... Miihlenbeckw 
20 {Te . lanc., usu. reddish or purplish, imbricate.......... Sree ata 
Ls. spablane yellow-green, less Sa paicis. ¢ : 5 short .. “genm 
21 EL agen abioe or (pallescens and Sauwtert) monoicous 22 
Plant dioi 27 
Ls. ani ai in tufts at intervals ‘¢ on the stem; margin pave at the 
22 toothed apex, not ene d abov provinciale 
Ls. more or le 23 
93 Ls. coneave, w. plan © margin, not bordered, entire Sautert 
Ls. ae Sout, margin recurved 24 
94 Ls. sc. bordered above; a often incurved .........-+0++ intermedium 
Ls. distinctly border ed w. narrow ae oo regular 25, 
25 Ls. r. twisted, even when moist; caps. obconic, purple .. lorqeaeaas 
Ls. se. twisted; even when dry; caps. rr ag poo spenieecage = 
26 Pl. Mac adh r lurid-green; nerve r. shortly ex 
Lower ls. red, w. long et a matted w. radictes pisses Lee 
97 | Ls. ‘dieanely bordered w. n cells 28 
(Ls. not or se. bordered, at Teast i in ‘the upper part 33 
28. Border thickened, of anate than one layer of cells 29 
Border of one layer on 30 
29 Uta 8 crisped an SAG en dry, green; caps. clavate ...Donianum 
sc. crisped, usu. read caps. oblong-pyriform............... pallens 
Ls. obovate, abruptly pointed, twisted when dry ........ sense Capillare 
20115. ovate o f lane., tay -» tapering, sc. twisted when dry Pt 21 
31 {Ls ¥- plane weed ed “shah » long-pointed, with r. lax cells seesees DOrbatum 
“| Margin recur 32 
32 {ri v. actminate, entire ; caps. obconic, w. long neck ......obcon 
Tall; 1s. usu . serrul. a at apex; caps. oblong Bees wes Sree ton 
pyriform; lid 
Ls. shortly muer 4 
3a Caps. globosé-pyriform, cence oe a: ol. eet dry. Oe re deny yon 
5 w. long, fine, er aga Points, erect when dry; sie oblong- 
merons 
Caps. oblong or pyriform, 
Caps. rounded at base; n. r. pared excurrent cae puiiooee 
i ace cpeten eee wards base, oblong-pyriform 
aa\¥- eras exenrrent; cells about 5 wide; ‘lid ob btuse ......murale 
= {N. ; cells 10—12 » wide; lid apicul. ......erythrocarpum 
