— 301 — 



bb. Capsule US. distinctly sulcate when old. 

 S.O.Speciosum Esenbeck. 



Leaves ovate-lanceolate subulate-acuminate or r. subobtuse at 

 apex, not or r, appressed when dry, falcate when moistened. 

 Capsule pale brown when ripe; teeth whitish or pale yellow, 

 us. appressed to it when dry; ciUa not sinuous; pedicel shorter 

 than capsule; calyptra hairy. Tufts us. pale or yellowish green; 

 stem us. long. — On trees or less often on stones. Eur. com- 

 mon, but r. in alp. regions. Sweden, Norway, Switzerl.! Amer. 

 Can.: Macoun; Waghorne. 



* O.elegans Bchwsegrichen. 



Capsule pale or greenish; teeth pale yellow; calyptra nearly 

 glabrous. Tufts 1 — 2 c. m. high. — Eur. r. »Finl.»: Lind- 

 berg. Amer. »U. S.»: Cardot. {Asia, Sibiria: H. W. Arnell). 

 9.0.Roellii Venturi. 



Differs from 0. speciosum: Capsule longer exserted shorter 

 than pedicel; teeth pale yellow erect when dry. — Rocks r. 

 Amer. U. S.: J. Roell. 



* O.stenocarpum Venturi. — 0. lonchothecium C. M. et Kindb. 



Capsule less distinctly sulcate; teeth often smooth. Leaves 

 dark green nearly appressed when dry. — Rocks r. Amer. 

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



* O.Schlotthaueri Venturi. 



Capsule longer than pedicel; teeth sometimes appressed when 

 dry. — Rocks r. Am,er. U. S.: Roell. 

 lO.O.Killiasii C. Mueller. 



Leaves ovate-lanceolate shorter and shorter-subulate than in 

 0. speciosum, appressed when drj^, not falcate when moist. 

 Capsule faintly sulcate; teeth yellowish erect when dry; cilia 

 sinuous; pedicel shorter than capsule; calyptra finally glabrous. 

 Tufts brown 1 — 3 c. m. high. — Alp. rocks r. Eur. Norway, 

 Switzerl.! Amer. U. S.: Roell. 



2. Arctica. 

 ll.O.Pylaisii Bridel; C. M. syn. — 0. Breutelii Hampe; O. 

 Blyttii Schimper. 



Leaves ovate-oblong or broadly ovate-lanceolate more or less 

 obtuse, narrowly or slightly reflexed, faintly open when moi- 

 stened; cells gen. short. Capsule suboval; teeth not or faintly 

 ■perforate; cilia short or rudimentary; calyptra hairy. 



Leaves short us. faintly papillose; costa subpercurrent. Cap- 

 sule exserted distinctly sulcate; teeth opake; pedicel long. TuftS 

 olive-green or brown. — Rocks near sea in northern princ. 



