Analytic Keys to the Species of Mosses. 
67 
Leaves papillose. 
Base with large fimbriate-papillose auricles. 
Margins reflexed near apex, replicate below middle A. Californicus, 7. 
Margins not at all reflexed ..... A. apiculatus, 4. 
Base not auricnlate. 
Leaves filiform-acuminate. A. rostratus, 1. 
Leaves obtuse or apiculate. 
Branches attenuate.A. atteimatiis, 2. 
Branches not attenuate. 
Leaves open-erect, teeth nodose ... A. obtusifolius, 3. 
Leaves secund, teeth not nodose ... A. viticulosus, 5. 
PYLAISiEA, p. 308. 
Segments free, sj)lit below, leaves quite entire. 
Plants glossy green. P. poly an til a, b 
Plants pale yellowish green ..... P. heteroinalla, 2. 
Segments free, split throughout, leaves serrulate at apex, 
P. subdenticulata, 3, 
Segments ^-adherent to teeth, spores 19—20 u. 
Leaves long-acuminate, margin not recurved . . P. intricata, 4. 
Leaves short-acuminate, one or both edges recurved . P. Selwyni,b 
Segments wholly adherent, spores 28 n . . . . P. yelutina, 5. 
HOMALOTHECIUM, 1 2 p. 309. 
Costa short, simple or forking, vanishing below middle. 
Teeth red, operculum rostrate . . . . H. subcapillatum, b. 
Teeth yellow, operculum short apiculate . . . H. corticolum, 3 . 
Costa narrow, vanishing in point H. pseudosericeum, 2~ 
CYLINDROTHECIUM, p. 310. 
Capsules clustered (3 or 4).C. Floridaniim, 4.. 
Capsules solitary. 
Plants densely pinnately branched, leaves muticous C. concinnuni, 8. 
Plants loosely pinnately branched, leaves pointed. 
Gradually narrowly acuminate C. breyisetum, 3. 
1 Kindberg: Ottawa Naturalist ii (1889), 156. 
2 Renauld & Cai’dot refer Hypnuvi Nevadense (30) to tais genus. Bot. Gaz. xiii (1888) 202. 
3 Kindberg: 1. c. 
