— 302 — 



arctic distr. r. Eur. Norway: E. Nyman; I. Hagen. Spetsber- 

 gen: Berggren. Amer. Greenl.: Berggren. Can.: Waghorne. 



* O.breTinerve Lindberg. 



»Leaves nearlj' smooth; costa abbreviate. Tufts brown. — 

 Eur. r. Finl.s: Lindb. musci scandin. 



* O.Sommerfeltii Schimper. 



Leaves longer nearly smooth; costa subpercurrent. Tufts green 

 or yelloYidsh green. — Eur. r. Norway: W. Baur; Arnell. 



* O.microblephare Schimper. 



»Leaves broadly ovate-lanceolate distinctly papillose; costa sub- 

 percurrent. Capsule faintly sulcate; teeth smooth above; pedicel 

 short. Tufts blackish. — Eur. r. Finl.»: Lindb. 1. c. 



* O.arcticum Schimper. 



Leaves as in the last. Capsule faintly sulcate not wholly 

 exserted; teeth opake; pedicel short. Tufts blackish or dark 

 green. — Eur. r. Norway: Zetterstedt; W. Baur. Russia: Bro- 

 therus. 



* O.groenlandicnm Berggren. 



» Differs in peristomial teeth separated not connate in pairs. 

 Amer. r. Greenl. »: Berggren. 

 12.0.sordidam Sullivant et Lesquereux; Sull. icon. m. 



Leaves ovate-oblong or broadly ovate-lanceolate gen. acute 

 sometimes short-acuminate, faintly papillose and broadly recur- 

 ved, open when moistened; inner basal cells narrow. Capsule 

 broad-oval or subpiriform immersed or nearly exserted; teeth 

 opake perforate above; cilia long; calyptra sparingly hairy; pe- 

 dicel very short. Tufts dusky green about 1 c. m. high. — 

 Trees r. Amer. Can.: Macoun. 



3. Affinia. 

 IS.O.afflne Schrader. 



Leaves ovate-lanceolate us. subulate-acuminate and very pa- 

 pillose. Capsule oblong yellowish green defluent to the long 

 neck; teeth pale perforate (fenestrate) above, finally appressed; 

 pedicel very short; calyptra sparingly hairy. Tufts green us. 

 2 — 3 c. m. high. — On trees r. on stones. Eur. common. 

 Sweden, Switzerl.l Amer. r. Can.: Macoun. 



* O.fastigiatnm Bruch. — 0. neglectum and 0. appendiculatum 

 Schimp. 



Leaves shorter-acuminate less papillose. Capsule suboval; 

 calyptra nearly glabrous. Tufts us. pulvinate and about 1 c. m. 

 high. Habit of 0. pumilum. — Trees. Eur, not uncommon, 

 Sweden, Switzerl.l Germany; Warnstorf. 



