Grimmia.] BRYACE^. 137 



rower linear-lanceolate leaves, marked at the obtuse apex by a few large 

 teeth and more narrowly costate, the more compact areolation, the short- 

 beaked obtuse lid, the teeth pale red and cribrose in the upper part only, 

 etc. 



6. G. maritima, Turn. Densely tufted, dark green or 

 blackish: leaves closely imbricate, cui'ved and more or less 

 twisted when dry, lanceolate-acuminate or mucronate, and cari- 

 nate by a thick excurrent costa ; borders nearly flat : capsule 

 obovate, truncate ; teeth minutely cribrose, ferruginous. — Muse. 

 Hibern. 23, t. 3. Schistidium maritimum, Bruch & Schimp. 

 Bryol. Eur. t. 235 ; Sulliv. Mosses of U. States, 36. 



Hab. Sea coast, on rocks at Nahant, Massachusetts (Lesquereux). 



Subgenus II. SCOULERIA. 



Plants of large fine growth, dichotomous. Leaves thick, 

 chlorophyllose. Capsule immersed, globose, on short lateral 

 branches. Operculum fixed and persistent ujDon the columella. 

 Peristome of 16 teeth, divided into 32 short broadly lanceolate- 

 subulate segments, inflexed when moist, erect when dry. 



7. G. ScOTlleri, Muell. Plants dark green or black : stem- 

 leaves imbricate, open, spreading when moist, broadly ovate, 

 obtuse, carinate, flat on the borders, dentate from the middle 

 upward ; costa strong, brown ; cells round or hexagonal, inflated 

 or thick-walled above, larger, subquadrate and jiellucid at base ; 

 perichtetial leaves similar : calyptra glabrous : capsule large, 

 globose-turgid, thick, dark brown, with a broad orifice ; lid 

 small, flat, with a short conical apex. — Syn. ii. 654. Scouleria 

 aquatica, Hook, in Drumm. Muse. Amer. n. 63, and Bot. Misc. 

 ii. 33, t. 18 ; Schwaegr. Suppl. iv., t. 315. 



Hab. On rocks in running water, upon the Pacific slope; Portage 

 River {Scolder, who gave specimens to Drummond); on granite rocks in 

 Merced River, California (Bolander); Columbia River {Lyall); near 

 Portland, Oregon {Morris, E. Hall); Spokan Falls, abimdant {Watson). 



A beautiful and remarkable species, related to Cinclldotus in its mode 

 of growth and the exserted columella, and to Grimmia in the areolation 

 and other characters. 



Subgenus III. GASTEROGRIMMIA. 



Plants in short compact tufts. Leaves short. Inflorescence 

 moncEcious. Capsule emergent or immersed, borne on a short 

 arcuate pedicel, ovate, ventricose on the lower side. Lid mamil- 



