8o The Ottawa Naturalist. [August 



Rhyrichostegium serrulatmn (Hedw.), Kindb. Alabama : 

 Baker. 



PlagiotheciuTn psevdo-latebricola, Kindb. Canada, Cape 

 Breton : Macoun. P. albulum (C. M.), Kindb. Alabama : Baker. 



2. Plagiothecium denticulatum (L.). Br. Eur. * P. Ruthei, 



Limpricht. 



Capsule larger and more curved ; cilia sometimes appendicu- 

 late ; pedicel often 4 cm. long; leaves large, generally without 

 point, nearly undulate when dry. Not very distinct. Europe, 

 Sweden! " Germany" : Limpricht. 



3. Plagiothecium curvifolium, Schliephacke; Limpricht. 



Leaves somewhat small, often partly recurved, ovate-oblong 

 with a short often curved point; capsule not large, faintly oblique ; 

 cilia present ; lid usually muticous. Monoecious. Resembling 

 P. laetum and nearly agreeing with P. aciculari-pungens, C. M. 

 & Kindb. Rocks r. ; Eur., Norway! Sweden : P. Larsson ; "Ger- 

 many" : Limpricht. 



4. Calliergon subgiganteum, Kindberg, n. sp. 



Differs from C. gigantemn in monoecious inflorescence, from 

 C. cordifolium in stems or branches pinnate and leaves auricled — 

 from both in the very short ccsta of the leaves, in stem-leaves 

 generally nearly indistinct, in branch-leaves reaching to the middle. 

 America, Canada, "Sask., Prince Albert," i8g6, (fruiting): 

 Macoun. 



5. Calliergon subeugyrium, Renauld et Cardot. Hypnum, Ren. 



etCard. ; Calliergon, Kindb.; C. dilatatiforme, Kindb., in 



litt. ad Macoun. 



Leaves broadly ovate or rotundate, obtuse, not decurrent ; 

 cells generally sublinear, except the finally reddish alar ; costa 

 usually short and double ; capsule arcuate, very strangulate. 

 Monoecious. Tufts often brownish or golden glossy ; stem with- 

 out rhizoids. Habit of C. inolle. " Agrees with C. palustre \x\ 

 capsule not annulate." Rocks in water r. Amer, Canada, N. 

 Brunswick and Cape Breton : Macoun: Newfoundland : Waefhorne. 



Camptothecium acuminatum (Hedw.), Kindb. Pedicel of 



