— 76 — 



rostellate. — Trees in swamps r. Amer. Can.: Macoun. U. S.: 

 Roell; Kelsey, com. Cardot. 



B. Leaves long-decurrent very distant. Tufts sparingly ra- 

 diculose. Capsules unknown. 

 3.A.dissitifolium Kindb. cat. Canad. m. 



Leaves from subcordate or ovate base tapering to ;i sometimes 

 long acumen, denticulate all around; alar cells somewhat large, 

 the others oval-oblong very chlorophyllose. Tufts low green. 

 Dioecious. — Wet limestone rocks r. Amer. Can. near Niagara 

 and Owen Sound: Macoun. 



2. Serpen tia. 

 4.A.Tarium Hedwig. — Leskea H.; Amblystegium Lindb. in 

 part. 



Leaves broadly ovate-lanceolate or ovate-oblong, often entire; 

 middle cells gen. oval-oblong; costa gen. long, also in periche- 

 tial leaves not excurrent. Capsule curved; annulus compound. 

 Stem decumbent. Monoecious. — Logs, trees and stones, not 

 uncommon. Ear. Sweden, Norway, Switzerl., Italy! Amer. 

 Can.: Macoun; Waghorne. 



*A.radicale Beauvois. — Hypnum Beauv.; Amblystegium 

 Br. eur. 



Leaves smaller and more distant, denticulate; cells gen. 

 oblong; costa less long. — Eur. Switzerl.! Finl.: Lindberg. 



* A.porphyrhizon Lindb. in Schimp. syn. 



Leaves small and less broad, denticulate and crowded; cells 

 suboblong; costa faint often vanishing near middle. Confounded 

 with A. serpens. — Eur. not r. Sweden common, Germany, 

 Switzerl.! Engl.: Rogers. Amer. Can. common: Macoun; Waghorne. 



* A.Juratzkae Schimper. 



Leaves somewhat small denticulate more distant; cells gen. 

 oblong-lanceolate; costa subpercurrent. Eur. Sweden, Switzerl., 

 Germany! Amer. Can.: Macoun. U. S.: Roell. 



* A.leptophyllum Schimper. 



Leaves somewhat small denticulate crowded; cells oblong- 

 lanceolate; costa subpercurrent. — Eur. France: Philibert. 

 5.A.orthocladon Beauvois. — Hypnum Beauv.; Sulliv. ic. m.; 

 Amblystegium Kindb. 



Leaves larger than in A. varium and very chlorophyllose, 

 from ovate-oblong base acuminate, distant and nearly spreading; 

 middle cells gen. suboval; costa subpercurrent, broader than 

 in A. varium, in perichetial leaves still broader and excurrent. 

 Capsule us. suberect faintly curved; annulus simple; pedicel 



