— 253 — 



27.B.snlberocta Drummond. — Tortula Drum.; Barbula Kindb.; 

 Desmatodon obliquus Br. eur. 



Leaves not reflexed in upper third, gen. ovate-oblong acu- 

 minate acute; costa long-excurrent. Capsule subcylindric slightly 

 inclined or erect; teeth nearly once or half-twisted pale red. 

 Stem ver}' short. — Rocks in alp. regions r. Eur. Norwayl 

 Amer. Can.: Macoun; Drummond 145. 



2. Camptopodise. 

 28.B.Laureri Schultz. — Trichostomum Schz,; Barbula Kindb.; 

 Tortula Lindb.; Desmatodon Br. et Sch,; Tortula bryoides 

 Drummond. 



Leaves oval-oblong or oblong-lingulate sometimes acute, sub- 

 pellucid, reflexed all around; costa short-excurrent. Capsule 

 oblong; teeth half-twisted. — Crevices of rocks in alp. regions 

 r. Eur. Norway! Amer. Can.: Macoun; Drummond 135. 



IV. Pleurochsete Lindberg. 

 29.B.S(jiuarrosa Bridel. 



Leaves large ovate-lanceolate long-acuminate nearly subulate, 

 squarrose when moist. Capsule subcylindric; pedicel long. Tufts 

 eradiculose pale green or yellowish. Very r. fruiting. — Cal- 

 careous rocks princ. in "warmer districts r. Eur. Switzerl.l Nor- 

 way: Ryan. Greece: Heldreich. France: Husnot. Amer. »U-. 

 S.»: Lesq. et Jam. 



V. Tortella C. Mueller. 



A. Leaves rigid very brittle, the lower not crisped. Dioecious 

 r. fruiting. 



30.B.fragi]is Drummond. — Didymodon Drum.; Barbula 

 Wilson. 



Leaves long long-acuminate nearly subulate; costa long-ex- 

 current. Capsule subcylindric somewhat large; teeth red much 

 contorted; pedicel long often very thin. Tufts yellowish green 

 often high. — Wet earth princ. in alps. Eur. Sweden, Norway, 

 Switzerl.! Amer. Can.: Macoun; Waghorne; Drummond 142. 

 31.B.nitida Lindberg. — Tortula Lindb.; Barbula Juratzka; 

 Trichostomum Schimper. 



Leaves sublinear short-acuminate acute shorter than in the 

 last; costa short-excurrent. Capsule oblong-cylindric; teeth 

 yellow rudimentary not twisted. Tufts yellowish or blackish 

 brown below, often not high. — Princ. on calcareous rocks, r. '^ 

 Eur. Switzerl! Engl.; Rogers. Irel.: Holt. Italy: Bottini. Bel- 

 gium: Gravet. Amer. Can.: Macoun. 

 ' B. Leaves us. cxisped and soft (in B. tortuosa sometimes 



