304 FRYE 



I. Leaves about 7-8 mm. long. 



2. Leaf-sheath to blade about as 1:3-4. 

 3. Plants about 5 cm. tall or shorter. 

 4. Capsule 4-5 mm. long. 



5. Width of capsule to length as i i^S- 

 6. Stems simple or with few branches. 

 7. Pedicel 2-3 cm. long. 



On soil and rocks. — Egg Island, Disenchantment Bay, Alaska; 

 Stewart Island and Mt. Rainier, Washington; northern Europe. 



4. P. alpinum, typical. 



I. Leaves about 9-1 1 mm. long. 

 2. Leaf-sheath to blades about as 1:3-5. 

 3. Plants about 10 cm. tall or shorter. 

 4. Capsule 4-5 mm. long. 



5. Width of capsule to length as 1:2-3. 

 6. Stem much branched. 

 7. Pedicel 2I-3I cm. long. 



4e. P. alpinum var. macounii^^ (Kindb.) C. & Ther. in Proc. Wash. 



Acad. Sci. 4, p. 328 (1902). 

 P. macounii Kindb., in Bull. Torr. Bot. Club, 16, p. 96 (1889). 



I. Leaves about 12-14 i^i^^- long. 

 2. Leaf-sheath to blade about as i '.2,-S- 

 3. Plants about 15 cm. tall or shorter. 

 4. Capsule 5-6 mm. long. 



5. Width of capsule to length as 1:3-4. 

 6. Stems simple, rarely branched, 

 7. Pedicel 4-7 cm. long. 



On soil. — From the Alaska Peninsula southward along the coast 

 to Washington, and eastward across British Columbia to the Rocky 

 Mountains. 



POLYTRICHUM Dill 



Name derived from poly = many, and tricho = hair; referring 

 to the hairiness of the calyptra. 



Plants dioicous, loosely to densely caespitose. Stems rigid, from 

 subterranean rhizomes, erect or nearly so, densely leafy, simple, 

 rarely forked or much branched at the tip. 



Leaves erect when dry, from a sheath-like base, lanceolate to 

 awl-shaped, more than i cell thick except at margins, sheath i cell 



" Named after John Macoun, naturalist of the Canadian Geological Survey. 



