148 BKYACE^. [Racomitrium. 



Univ. i. 192. Grimmia patens, Bruch & Schimp. Bryol. Eur. 

 t. 246. 



Hab. Between Fort Colville and the Rocky Mountains {Druinmond, 

 Lyall) ; on rocks, White Mountains (James). 



Subgenus II. DRYPTODOK 



Plants fastigiately branching ; innovations simple. Cells 

 quadrate or oval above, generally erose, very narrowly linear 

 and sinuous at the base. 



2. R. aciculare, Brid. Loosely and irregularly cespitose, 

 bright or dark green, rigid, naked below : leaves more or less 

 turned to one side, oblong at base, lanceolate, obtuse, entire, or 

 the upper marked at the apex by a few small distant hyaline 

 teeth : capsule oblong-cylindrical, brown, erect ; lid long, nar- 

 rowly subulate or acicular-beaked ; teeth cleft to below the 

 middle. — Bryol. Univ. i. 219; Bryol. Eur. t. 262. Bryum 

 aciculare, Linn. Sp. PI. 1118. Grimmia acicularis, Muell. 

 Syn. i. 801. 



Hab. Wet rocks, waterfalls in mountains; not rare. 



3. R, depressum, Lesq. Plants yellowish brown, in wide 

 loosely compressed tufts ; stems very long, scarcely branching : 

 leaves loosely imbricate, appressed when dry, open and homo- 

 mallous when moist, broadly ovate, dilated and semi-auricled at 

 the decurrent base, lanceolate above, obtuse, entire or slightly 

 distantly denticulate at the apex ; costa flat ; cells of the auri- 

 cles quadrate or broadly equilateral, more or less granulose, the 

 basilar linear and continuous, the upper broadly ovate : capsule 

 subcylindrical, not narrowed at the orifice, immersed on a short 

 pedicel scarcely half as long as the lateral fruit-bearing innova- 

 tions ; teeth rarely bifid, mostly tripartite with unequal free or 

 cohering smooth segments. — Mem. Calif. Acad. i. 14. 



Hab. Falls of the Yosemite (Bolander). 



The species resembles in size and color E. protensurn, var. cataracta- 

 rum, but differs in the broader and larger leaves inclined to one side, 

 more obtuse and generally denticulate, as in i?. aciculare, the thin base 

 somewhat enlarged into a narrow auricle, whose reticulation is broad- 

 quadrate like that of a Dicranum. The wide-mouthed capsule is nearly 

 exactly cylindrical, sometimes slightly curved ; the teeth are more irregu- 

 larly divided than in B. protensurn, and the articulations more distinct. 



4. R. Nevii, Watson. Related to E. aciculare in the color 

 of the plants and form of the leaves, but differing essentially 



