— 213 — 



above perichetial leaves; tufts very dense. — Eur r. FinL: 

 Sileii»; Lindberg. 



B. Leaves short us. obtuse. Stem low. 



a. Leaves obtuse, tristichous princ. on sterile shoots. Stem 

 and shoots somewhat elongate. Capsule piriform with straight 

 pedicel; teeth obtuse. 



7.S.tristiolia Bridel. — Weisia Brid.; Seligeria B. S. 



Leaves sublinear; costa distinctly excurrent. Perichetial 

 leaves gradually acuminate; costa long-exourrent. — Dripping 

 calcareous rocks r. Eur. Engl.: Rogers; Cash. France: Boulay. 

 Amer. Can.: Macoun. 

 S.S.tristichoides Kindb. revue bryol. 1896. 



Leaves sublinear, broader than in the last; costa not distinctly 

 excurrent. Perichetial leaves abruptly acuminate; costa per- 

 current or short-excurrent. — Eur. r. Norway in northern di- 

 strict: Schlegel and Arnell; E. Nyman. 



b. Leaves plurifarious. Stem and shoots very short. 

 9.S.calcarea Dickson. — Bryum Dicks.; Seligeria B. S. 



Leaves subovate abruptlj^ attenuate; costa excurrent. Capsule 

 piriform erect; teeth obtuse; pedicel straight. — Calcareous or 

 schistaceous rocks r. Eur. Switzerl.l France: Husnot m. gall. 

 Amer. Can.: Drummond; Macoun. 



* S.crassinervis Lindberg. 



»Capsule inclined; teeth acute; pedicel slightly curved at 

 apex. — Eur. r. Sweden*: Lindberg. 



lO.S.diversifolia Lindberg. — S. compacta Philibert rev. bryol. 

 1897 ? 



Leaves (also the perichetial) sublinear or narrowly ovate-oblong, 

 gradually attenuate obtuse; costa not excurrent. Capsule erect 

 narrowly piriform; teeth subobtuse; pedicel straight. — Calca- 

 reous rocks r. Eur. Finl.: Brotherus, 



* S.obliquula Lindberg. 



Capsule broader; teeth acute; pedicel slightly curved when 

 dry. — Alp. rocks r. Eur. Norway in Dovrefjeld: Kaurin. 

 ll.S.campylopoda Kindb. cat. Canad. m. 



Leaves as in the last but the upper perichetial acute or 

 subacute. Capsule narrowly piriform finally sulcate; pedicel 

 strongly arcuate when moist. — Calcareous rocks r. Eur. A. 

 Blytt and H. W. Arnell. Amer. Can.: Macoun; Waghorne. 



99. Brachydontiura Bruch. 

 1 .B.tricliodes Weber til. — Gymnostomum W. f.; Brachydon- 

 tium Bruch. 



