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CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull 
Leaves strongly transversely undulate..... Rhytidium, p. 
Leaves not transversely undulate...................00005 
Paraphyllia numerous ................... Cratoneuron, p. 
Paraphyllia lacking .................-. Drepanocladus, p. 
Capsule oblong-ovoid; stem leaves much larger than 
branch: leaves .ccdcceckiagadales wees Brachythecium, p. 
Capsule oblong-cylindrical; leaves mostly uniform in size 
Stem densely tomentose, erect; leaves glossy...........- 
Camptothecium, p. 
Stem not densely tomentose; leaves rarely glossy......... 
Stem prostrate and irregularly branched; rhizoids mostly 
MUMEROUS® we ceen we saa eee eed meee Amblystegium, p. 
Stem prostrate or ascending; rhizoids few...............+ 
Chrysohypnum, p. 
Leaves complanate ........ E Lideiati dain cawnie mame e teenies 
Léaveés. not complanate. 2.005. asec saeco sean os cess sewed 
Leaves decurrent; basal areolation lax, alar cells often 
more or less enlarged................ Plagiothecium, p. 
Leaves not at all or very slightly decurrent; basal cells 
scarcely differentiated ...............- Isopterygium, p. 
Operculum long-rostrate ............. Sematophyllum, p. 
Operculum conical to short-rostrate...........-.. eee eee 
Leaves obtuse or apiculate, rarely acute.................. 
Teeaves: ACUMINAte: csi esiehuvie nd wiekls eines 8H% Heth rewiees Oa HEA Se 
Leaves usually more or less secund, gradually narrowed 
above to an obtuse or rarely acute apex; mosses growing 
on dripping or wet rocks.............Hygrohypnum, p. 
Leaves imbricated or spreading, with a broad rounded apex 
Mosses growing in swamps; stem with an outer layer of 
large hyaline cells oi. .cacccceunes senses Acrocladium, p. 
Mosses growing in dry woods; stem bright red, cortical 
CElIS SHAN, oa asicn ean ctntays a ood tu ema eam Hypnum, p. 
Leaves secund, falcate or circinate........... 0... eee eee 
Leaves mostly spreading ............. cece cece eee eee 
A large moss (8-20 cm.), very regularly pinnate, frondi- 
form; leaves multiplicate, smooth; paraphyllia numerous 
Ptilium, p. 
Medium-sized mosses (i-10 cm.), irregularly pinnate; 
leaves scarcely or not at all plicate; paraphyllia few or 
TIONG, see) slacysa Saree wea weeinenraceoarere cia de eG esiae sabes ee 
Leaves sharply serrate, papillose............ Ctenidium, p. 
Leaves entire or serrulate, smooth.......... Stereodon, p. 
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