— 243 — 



Leaves more distinctly involute and subcucullate. Peristomial 

 teeth often split. — Eocks r. Eur. Switzerl. near Luganol 

 S.B.pygmseum Lesq. et Jam. — Ptychomitrium L. J.; Brachy- 

 stelium Kindb. 



sLeaves linear from ovate base; costa vanishing far below 

 apex. Capsule oval; neck a third as long; teeth joined in 

 pairs at base, sometimes connate their whole length; calyptra 

 covering the capsule to its base. Plants very small. — On 

 stones (?). Amer. U. S.: E. Hall»: Lesq. et Jam. 



III. Glyphomitrium Bridel. 

 S.B.Dayiesii Dickson. — Bryum Dicks.; Brachystelium Kindb. 



Leaves narrow sublinear not or slightly reflexed below, from 

 suboblong not well defined base gradually tapering to a long 

 subulate carinate acumen; nearly all cells quadrate not opake: 

 only the lowest rectangular not much larger; costa percurrent. 

 Pcrichetial leaves suboblong apiculate; costa subexcurrcnt. Cap- 

 sule subglobose or obovate; neck nearly half as long; teeth 

 broad; calyptra covering capsule; annulus none. Leaves some- 

 times with brood filaments. Spores 0,03 — 0,04 m. m. — Ba- 

 saltic rocks r. Eur. Scotl.: Schimper. Engl.: W. H. Pearson. 

 L-el.: Stewart, com. Le Jolis. 



7.B.canadense Mitten. — Glyphomitrium M.; Brachystelium 

 Kindb. 



» Leaves lanceolate tapering to an acute or blunt point; bor- 

 ders recurved below to middle; basal cells oblong, the angular 

 narrower. Pcrichetial leaves very broadly ovate. Capsule oval; 

 pedicel shorter than in the last. — J.mer. r. Can.: Drummond»: 

 Lesq. et Jam. 



107. Driimmondia Hooker, musci amer. 1828. 

 l.D.clayellata SchwEegrichen. — Macromitrium Schw.; Drum- 

 mondia Hooker. 



Leaves suboblong or broadly ovate-lanceolate, acute or very 

 short- acuminate, carinate at least above, not distinctly involute; 

 cells small rotundate, the few not well-defined alar pubquadrate; 

 costa not wholly percurrent. Perichetial leaves nearly similar 

 but with short-rectangular cells at angles near base. Capsule 

 subglobose-ovoid brown smooth; lid nearly fiat, long-rostrate; 

 annulus none; pedicel short. Calyptra long-rostrate reaching 

 below the unripe capsule, finally concave and cucullate. Spores 

 very large about 0,06 m. m. Tufts green or brown green. 

 Dioecious. — On trees. Amer. Can. r.: Macoun. U. S.: Roell; 

 Sullivantj com. C. M.; Fitzgerald, com. Renauld, 



