288 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



dichotomous, sparingly branched, naked and decumbent at base: leaves 

 divergent from an erect oblong base, rather rigid, elongate-lanceolate, 

 lightly recurved at margin, subcomplicate-carinate, muticous, wings asym- 

 metric; costa stout, excurrent, uppermost leaves with short hyaline points; 

 basal cells linear-rectangular, dilated towards margin, upper quadrate, 

 sinuose, apical minute: perichaetial leaves oblong lanceolate, acuminate 

 with short hair points: capsule exserted on a short straight seta, small, 

 ovate, smooth ; lid conic, obtuse ; annulus of 2-3 rows of cells; calyptra 

 cucullate; teeth yellow, broad, cleft or perforate only at the apex. 

 Braithw. Brit. Moss Flora 2: 30. Greenland. 



186. Grimmia sulcata Sauter. Stems erect, branching, in olive green 

 tufts: lower leaves muticous and obtuse, upper oblong lanceolate, with a 

 short hyaline point, bistratose in upper part, longitudinally trisulcate 

 especially above the middle; lower cells short rectangular : dioicous: peri- 

 chsetial leaves shorter and less sheathing than in O. alpestris: capsule 

 exserted, oblong sub-cylindric; lid convex, beak a little longer than in 

 G. alpestris; annulus persistent, scarcely distinct; teeth of peristome 

 entire, red; calyptra cucullate, covering %-% the capsule. Husnot, Muse. 

 Gall. 129. Franz Joseph Fjord, Greenland. 



187. Grimmia microtricha C. M. & Kindb. Plants in small blackish 

 pulvinate tufts with greenish tops: leaves when moist sub-erect, short 

 ovate lanceolate, margins recurved, plane only at the short base; cells 

 short, alar narrow and hyaline: perichaetial leaves ovate obtuse: capsule 

 oblong, smooth; teeth dark red; pedicel flexuous: dioicous, or monoicous 

 on distinct branches. Differs from G. alpestris principally in longer 

 emergent capsules, recurved leaf margins, and short perichaetial leaves. 

 Mac. Cat. 70. OP rocks : Revelstoke, B. C. 



188. Grimmia tenerrima Ren. & Card. In small, compact, gray tufts: 

 leaves small, oblong-lanceolate, lower muticous or with a short hyaline 

 point, upper prolonged into a smoothish hair; borders generally reflexed in 

 the upper part; costa canaliculate; basilar cells lax, quadrate, pellucid, 

 thin walled, upper bistratose, subquadrate, with scarcely thickened walls : 

 capsule exserted on a short pale pedicel, small, leptodermous, smooth, 

 yellow or pale brown : lid convex apiculate; peristome orange red, teeth 

 patulous when dry, papillose, perforated, more or less lacerate at the apex; 

 calyptra cucullate: male flowers unknown. Bot. Gaz. 15: 40.1890. Moist 

 bluff towards the snow line: Mt. Hood, Oregon. 



189. Grimmia mollis B. and S. Dioicous: tufts lax, soft, dark green: 

 plants robust, stem bifurcating: middle leaves erect spreading when moist, 

 very soft, oval-lanceolate or oblong, obtusely rounded, concave cochleari- 

 form, plane on the border, unistratose; costa narrow, vanishing below the 

 apex; lower cells rectangular, upper roundish-quadrate: perichaetial leaves 

 acuminate, with hyaline points: capsule short exserted, not passing be- 



