58 
Wisconsin Academy of Sciences , Arts and Letters. 
b. Capsule longer (1:3 -{-) 
i. Collum long (4 sporangium or more). 
Leaves strongly twisted when dry, abruptly pointed . B. capillare, 31. 
Leaves erect and straight when dry. 
Collum equalling sporangium . . .. B. obconicnm, 33. 
Collum one-half the sporangium. 
Capsule constricted below the mouth . . B. csespiticium, 30. 
Capsule not constricted .... B. Yaacoiiyeriense, b 
ii. Collum short (£ sporangium or less). . B. occidental, 32. 
§ III. Rhodobryum. 
Costa percurrent or vanishing, margins re volute below, 
collum short. B. roseum, 41. 
Costa excurrent, margins revolute f to |, collum ^sporang¬ 
ium, curved.B. Ontariense b 
§ IV. Anomobryum. 
Costa sub-excurrent . . . . . . B. concinnatum, 42. 
Costa vanishing below apex. B. bill latum 3 . 
Bryumhydrophyllum Kindberg 1 2 is a species t£ closely allied to B. pseudo¬ 
triquetrum,” but so imperfectly known (neither flowers nor capsule hav¬ 
ing been found), and so briefly characterized that I am unable to assign 
it to any place in the key. 
ZIERIA, p. 240. 
Costa vanishing, collum twice sporangium . . . Z. julacea, 1. 
Costa excurrent, collum — sporangium ... Z. demissa, 2. 
MNITJM, p. 241. 
I. Leaves serrate. 
A. Teeth of leaves single. 
Stems dendroid. M. Menziesii, 21. 
1 Kindberg: Bull. Torr. Bot. Club , xvi (1889), 95. 
2 Kindberg: Ottawa Nat. ii (1889), 155 and i. c., p. 96. 
8 Muller: Flora 1887, 221. 
