Grimmia.] BRYACE^. 135 



covering the lid only. Cajisule immersed or on a short straight 

 pedicel. Lid broadly convex, cuspidate, falling off with the 

 columella. Teeth lanceolate, cribrose, rarely rudimentary. 



1. G. conferta, Funck. Leaves oblong or ovate-lanceolate, 

 acuminate, opaque, with a short denticulate hair-point ; borders 

 slightly inflJited above on the right side, reflexed toward the 

 base : capsule ovate-globose ; lid broadly convex at base with a 

 short apiculate beak; teeth lanceolate, siAit and cribrose; 

 annulus none. — Moos-Tasch. 18, t. 12; Schimp. Syn. 199. 

 Schistidium confertum^ Bruch & Schimp. Bryol. Eur. t. 232 ; 

 Sulliv. Mosses of U. States, 36. Grimmia apocarpa^ var. con- 

 ferta^ Muell. Syn. i. 777. 



Var. obtusifolia, Schimp. Leaves shorter and broader, 

 obtuse, bright green. — Syn. 200. 



Var. compacta. Stems short, compact ; tufts slender, 

 mostly simple, compressed. 



FTab. On rocks, wet or dry, plains and mountains; var. obtusifolia, 

 in shaded places, common; var. compacta, Lake Superior (Macoiin). 



Differs from G. apocarpa, especially in the leaves erect and blackish 

 when dry, with borders less recurved, the costa stouter, dilated, promi- 

 nent on the back, and more channelled above, the capsule smaller, 

 paler, of thinner texture and almost pellucid, the beak of the lid blunt 

 and slightly shorter, and the teeth more cribrose and somewhat lacerate, 

 orancre-colored, fragile and fugacious. 



G. PUBixcuRVA, Aust. (Coult. Bot. Gaz. iii. 31), described from sterile 

 specimens, is said to differ from G. conferta in the leaves muticous, not 

 hyaline-apiculate, the margins less recurved and the cells of the areola- 

 tion much smaller. In G. conferta, var. obtusifolia, the leaves are 

 obtuse and not hyaline-pointed, and in all the forms of that species 

 the margins are not reflexed or only slightly so. The author compares 

 the species also to Zyrjodon Mougeotii, with which it was found, and 

 finally remarks that the species is chiefly characterized by the muticous 

 snbincurved apex of the leaves, and that in the upper part of the leaves 

 the cells are often broader than long and slightly obscure. 



2. Gr. ambigua, Sulliv. Closely resembles G. conferta^ 

 from which it differs in the larger perichaetial leaves prolonged 

 upward into a long scabrous hyaline hair-point, the oval-oblong 

 capsule, the scarcely perforated teeth, and the cuculliform 

 calyptra. — Icon. Muse. i. 66, t. 41. Schistidium ambiguum, 

 Sulliv. Mem. Am. Acad. n. s. iv. 170, and Mosses of U. States, 

 36. 



Hab. Dry rocks; Santa Fe, New Mexico {Fendler)\ near Easton, 

 Pennsylvania (James, E. Baur). 



