142 BRYACE^. [Grimmia. 



17, G. Olneyi, Sulliv. Very similar to G. tricho2)hyUa, 

 cliff erina: in the leaves lanceolate from a more enlarged ovate 

 base, more rigid, not flexuous, with a more compact areolation, 

 and the borders flat and not reflexed toward the base, the cap- 

 sule smooth, not furrowed when dry, the pedicel shorter, and 

 the lid somewhat shorter beaked : the jjeristome, the calyptra, 

 more deeply split on one side, and the annulus are the same in 

 both. — Mosses of U. States 37, and Icon. Muse. 67, t. 42; 

 Sulliv. & Lesq. Muse. Bor,-Am. Exsicc. n. 141. 



Hab. On flat dry or wet rocks ; Eastern States, not rare. 



18. G. Oalifornica, Sulliv. In loose, sometimes wide 

 tufts : leaves open, erect, lanceolate, carinate-concave, reflexed 

 on the borders ; costa excui*rent into a short hyaline denticulate 

 hair-point: capsule obovate, subpyriform and jaendent from a 

 short arcuate pedicel ; teeth short, irregularly bifid at the apex. 

 — Pacif. R. Rep. iv. 187, t. 4, excl. var. 



Hab. On rocks, California; common. 



Tlie lid, calyptra and annulus, and the general facies are the same in 

 this species as in the two preceding. G. trichophylla has the stems 

 longer, less crowded and more slender, the leaves flexuous, the capsule 

 prominently ribbed when dry, and longer flexuous pedicels, while G. 

 Olneyi has the leaves canaliculate-concave, not recurved on the borders, 

 and linear-lanceolate from an ovate base. 



Subgenus V. GUEMBELIA. 

 Plants erect. Leaves open, not crispate when dry, solid, 

 generally hair-pointed, flat on the borders. Calyptra mitrate 

 and five-lobed, or oblique and more highly split on one side, 

 thus appearing half-cucullate, half-mitrate, or distinctly cucul- 

 late. Capsule erect on a straight pedicel, exserted or rarely 

 immersed, regular, not costate. 



* Calyptra lohate-mitrate. 

 •I— Flov^ers monoecious. 



19. G. Donniana, Smith. Plants short, small, whitish 

 green, pulvinate : leaves soft, pale green, blackish brown when 

 dry, the lower small, lanceolate-acuminate, the upjjer much 

 longer, narrowly lanceolate, gradually tapering into a long 

 nearly smooth diaphanous hair-point ; borders slightly thicker 

 toward the apex ; perichaitial leaves longer, with the hair-point 



