z¥ TO THE GENERA AND SPECIES OF BRITISH MOSsEs. 903 
RHYNCOSTEGIUM.* 
1 re. nerv: Soi or poet Be fo ders 2-nerved 2 
Ls. singly nerved half-w: 3 
g | Ls. aa seoaiplacs , fin nelly sal paren PIGION oo. isesdecsteves depressum 
(Ls. subsecund, entire, Ww. one or more swelbats angul. cells...demissum 
3 | Ls. Seige etna 4 
(Ls. ovate (all w. smooth seta) 5 
4 175 alm. setaceous, silky, n. alm. to apex; seta smooth ..... oan 
Ls. clustered a ends of Abed acute, n. short ; ; seta rough...curvisetum 
5 1x stro pex; Is. firm; pl. aquatic ...........0ss00+ rusiforme 
N. thin, usu. about 2 length of leaf; plant terrestrial..........s:+ssse0++ 
g | Ls. wide, v. twisted when dry, cells 12 » wide............ rotundifotinm 
\Ls. less widely . se. twisted, cells 5 or 6 / wi 
117 v. concave, 1m obtuse et OF Bopictes fey ween 
Ls. only slightly Sire acum 
3{ Se about 1 in., rooting; on aia trees, &........... Geeeeuss = confertum 
St. }—3 in., not rooting; growing on the ground ...... aapapotlibem 
SCLEROPODIUM. 
1 / Ls. ovate-oblong, apicul.; brs. rounded, obtuse, incurved. > rent Bane 
(Ls. ovate-lanceolate, acute; brs. slender........+0 ajvenvouriey aespitosum 
SELIGERIA, 
1 { Perist abse: Doniana 
| Peris tome aa 2 
a| Seta arcuate whee emake; caps. oval or oblong recurvata 
§ eta straight w. moist 2 
3 Gas elliptic, w gh ge th, one ign ls. acute ......swbcernua 
short, crert, spelt when dry and empty 4 
4 {ie short, r. obtus ta thick . calcarea 
Ls. longer, inoecaterobalat; seta slender 
5! Seta v. short; caps. sc. exserted; Is. v. acute ...... (var. of) acutifolia 
5 | Seta longer; Is. not Ceuaitaar to base of capsule 6 
6 to lane., w. short obtuse subula, exactly 3-ranked ............ tristicha 
Ls. narrow, lanceolate-setaceous, acute pusilla 
SPHERANGIUM. 
1 { Perich. ls. 2, convolute, not keeled; pedicel straight muticum 
1) Perich. Is. 3, connivent, keeled; pe edice CYQNEOUS......0..45 triquetrum 
genes (N.B.—In this genus, ‘‘c. c.” stands for the obloropy let 
and “h. c.” for the iyaiine cells, of the branch-leaves.) 
1! (Br. oe be oad, cucull., scaly at back of apex; st. cuticle name! ee 
| Br. ls. not sealy at apex, rarely cucull.; cuticle not fibrous ............4 
9! Pl. green or purple; c. c. enclosed, w. smooth walls ......... cymbifolium 
ee espec. apices of br. Is.; ¢. c. w. papillose walls........ 
3 | Pa v. small; c. c. lenticular, enclosed ...........s0.0+-+00 _papillosum 
 Pabille staan c. ¢. triangular, emerging in front.............. -Austini 
4{ Br. Is. oblong or o siti short, bluntish apices .............::scseeeee ae 
41 Br. Is. ovate-lanc., w. ellie tapering apices 9 
species of Eurhynchium may generally be ee by having 
wg site or less plicate leaves, or a suberect capsule, or a rough seta, 
of which occur in Rhyncostegium (exe . curvisetum ; see under penser 
+ In cases of difficulty, the student may find assistance by following the 
arrangement adopted by Mr. John Sim; see Scottish Naturalist, vol. iv., p. iv, pe 172. 
