zz $64 = 
B. Leaves costate, not appressed when dry, often falcate. 
2. Nivales. Leaves papillose, crisped or flexuous when dry; 
the perichetial costate. Dioecious, r. fruiting. 
3. Rupestres. Leaves smooth or (sometimes in A. frigida) 
faintly mamillose, not crisped: inner. perichetial convolute and 
(exc. A. Rothii) nerveless. Monoecious. 
1. Petrophile. 
A. Leayes broader above base, somewhat large; perichetial 
obtusate. Stem often longish. 
a. . Leaves slightly crenulate at base; cells small. 
l.A.alpina L. — Jungermania L.; Andreea Smith. 
Leaves short-acuminate obtuse crowded nearly smooth, us. 
appressed when dry. Tufts blackish; stem erect not much 
high. — Rocks near Atlantie sea r. Eur. Norway! R. Hartman; 
F. Kier, : 
b. Leaves entire; cells somewhat large. 
2.A.Hartmani Schimper. 
Leaves large gen. obtusate and distant, nearly smooth and 
not appressed. Tufts brownish. Stem us. very long and floa- 
ting. — Stones in rivulets in northern alps r. Eur. Norway! 
Sweden: K. F. Thedenius. 
* A.Thedenii Schimper. | 
Leaves less large and more distinctly acuminate, crowded, 
faintly papillose, often appressed. ‘Tufts blackish brown; stem 
erect not much high. — Wet rocks in norther alps r. Bur, 
Norway! 
3.A.obovata Thedenius. 
Leaves less large gen. long-acuminate, crowded, distinctly 
papillose and appressed, reddish or brown-red when moist. [55 
Tufts blackish when dry; stem erect not much Ino) We 
rocks in northern alps r, Eur. Norway! Sweden: R. Hartman. 
Finl.: Brotherus. Amer. Greenl. Berggren. 
B. Leaves broader near base, gen. small and appressed 
when dry; perichetial sometimes acuminate. "Tufts loose; stem 
erect. | ps 
4.A.petrophila Ehrhart. 
Leaves ovate oblong or ovate-lanceolate acuminate gen. sub- 
obtuse distinctly papillose and crowded: inner perichetial us. 
obtusate. Tufts gen. brown and low. — $giliceous rocks Com 
mon. Eur. Sweden, Norway, Switzerl.! Spain: Levier. Amer. 
Can.: Macoun; Waghorne. ne 
