Rypnum.] BRYACE^. 3-19 



branch-leaves, the reflexed margins of the stem-leaves, the more strongly 

 one-nerved perichtetial leaves, and the solitary cilia. — (Mitten). 



65. H. acuticuspis, Mitt. 1. c. Leaves loosely imbricate ; 

 those below the perichfetium cordate-ovate, narrowly long- 

 acuminate, minutely serrulate on the borders, nearly smooth at 

 the cusjoidate apex, with a very short diffused costa, forking or 

 entire, vanisliing in the middle ; cells of the basal angles obscured 

 or dusky ; leaves of the branchlets elliptical-ovate, acute, ser- 

 rulate, nerved to the middle, smooth on the back; the peri- 

 cha3tial subulate from an oblong ecostate base, recurved, veiy 

 entire : capsule on a short pedicel, oval, inclined ; lid conical ; 

 cilia two, shorter. 



Hab. British Columbia (Douglas). 



3Iicten, who had seen only two stems of this moss, says that it may be 

 H. BreioeriamDii, Lesq., but that the description of that species is not 

 sufficiently complete to be quite certain. 



66. H. Brewerianum, Lcsq. In compact dark green or 

 yellowish green tufts ; stems creeping, simple at base, radicu- 

 lose, fasciculately branching above ; branches simple, erect, or 

 subcurved, julaceous when dry, narrowed toward the base or 

 inflated in the middle : leaves imbricate, appressed when dry, 

 open Avhen damp, those of the stem distant, broadly ovate- 

 lanceolate, long-acuminate, serrulate at the apex, the costa dis- 

 appearing in the middle; branch-leaves shorter and broader, 

 broadly ovate-lanceolate, short-acuminate, sharply serrulate 

 above, costnte to above the middle ; areolation at base ovate, 

 oblique and irregular, oval in the middle, broader and rhora- 

 boidal-obtuse toward the apex, subjiapillose : capsule erect, 

 cylindrical-ovate, turgid below, constricted under the orifice ; 

 operculum conical-rostellate or conical-acute ; cilia two, robust, 

 equal to the segments. — Trans. Amer. Phil. Soc. xiii. 12. 



Var. lutescens. Pale dirty yellow; branches longer, sto- 

 loniferous : perichietial leaves shorter, acuminate, serrulate ; 

 areolation shorter and broader: capsule longer, subcernuous; 



cilia slender. 



Hab. Granite rocks near Mission Dolores (Bolander)] Monterey 

 ( Watson ) ; Sierra Nevada (Brewer). 



The color of the plants, due to exposure to the sun, the compact tufts, 

 the branches nearly simple, rarely attenuated or stoloniferous, terete or 

 julaceous by the imbrication of the leaves, the capsule somewhat longer 

 and generally erect, are the essential characters separating this species 

 from II. stoloniferum. 



