b. Leaves gen. distant; alar cells not large. 



aa. Leaves serrulate or serrate, gen. large; costa simple us. 

 long. 



9.R.serrulatum Hedwig. — Hypnum H.; Sullivant ic. m.; 

 Rhynchostegium Kindb.; Hypnum (Rhynchostegium) Lq. et Jam. 



Leaves serrulate pellucid neither striate nor decurrent; cells 

 sublinear exc. the sometimes not well-defined alar; costa thin 

 often reaching above middle. Stem-leaves filiform-pointed us. 

 ovate-oblong; branch-leaves broadly ovate-lanceolate with short 

 sublinear twisted point. Capsule arcuate; segments entire; an- 

 nulus broad; lid rostrate; pedicel smooth up. long. Stem pin- 

 nate creeping, r. with paraphyllia. Tufts pale green. Monoe- 

 cious. — On ground in dry woods. Amer. not r. Can.: Macoun. 

 U. S.: Roell; Sullivant, com. C. Mueller; Fitzgerald, com. Renauld. 



* R.eriense Kindb. — Eurhynchium note on Can. bryol. 



Leaves subovate nearly crowded, shorter and less distant; alar 

 cells more distinct. Capsule smaller; pedicel short. — Amer. 

 Can.: Macoun. U. S.: Roell. 



* R.hispidifolium Kindb. — Eurhynchium Kindb. 1. c. 



Branches longer. Leaves very long, ovate-lanceolate long- 

 acuminate sharply serrate. Capsules und flowers unknown. — 

 Amer. r. Can. Brit. Col.: Macoun. 



bb. Leaves entire or near apex minutely denticulate. 

 lO.Rsubintegrifolium Kindb. — Eurhynchium Kindb. 1. c. 



Leaves decurrent chlorophyllose ovate-oblong short-pointed 

 faintly striate; alar cells somewhat numerous, the others subli- 

 near; costa mostly thin gen. reaching to acumen, sometimes 

 thicker, shorter and forked. Capsule subobovate or arcuate; 

 pedicel smooth; lid and male flowers not seen. Habit of R. 

 serrulatum. — Logs r. Amer. Can. Brit. Col.: Macoun. 

 ll.R.styriaciiTn Limpricht et Breidler. — Limnobium Lpr. et 

 Breidl. in sched.; Rhynchostegium Kindb. 



Leaves (of branches) broad-ovate abruptly short-acuminate 

 neither decurrent not striate; cells oblong-linear exc. the dusky 

 quadrate alar. Tufts yellowish not radiculose. Synoecious. 

 Capsules not seen. — Inundated rocks r. Eur. Austria near 

 Schladming: Breidler, com. Limpricht. 



CC. Leaves minutely denticulate. 

 12.R.bifariellum Kindb. — Plagiothecium cat. Can. m. 



Leaves small neither striate nor crowded nor distinctly de- 

 current; alar cells small few quadrate, the others gen. linear. 

 Steni -leaves short somewhat broad ovate-cordate nearly entire 



