-67- 



long, 22 broad, median cells oblong-hexagonal 28-56// long, 14 broad, the 

 upper cells smaller and shorter, Antheridial buds terminal 25-30 antheridia. 

 Capsule nodding or pendant, narrowly cylindrical-arcuate, with a long neck 

 on a flexuous red seta 2 cm. long curved at apex ; operculum obtusely coni- 

 cal. Teeth of peristome very long, with a red base. Endostome well devel- 

 oped, cilia appendiculate. Spores smooth, 12//. 



From Kodiak (Trelease, 2186). 

 Bryum Laurentianum Card, and Ther. 



Plants tall, densely csespitose, yellowish green. Stems 3-4 cm. high 

 radiculose, sparingly foliate with numerous erect subclavate branches. 

 Leaves erect imbricate both dry and moist, ovate or oblong-lanceolate 

 1-5 mm. long, 0.75 broad, sharpely acuminate, margins plane and entire 

 below, distinctly denticulate above, costa stout, becoming brownish, So-ioojit 

 thick, gradually attenuate and vanishing below the apex, basal cells rectan- 

 gular, median and upper rectangular or oblong-subhexagonal 40-75// long, 

 14-17 broad, four or five rows of marginal cells longer and narrower, linear, 

 with walls a little thicker forming a scarcely distinct border. Other charac- 

 ters unknown. 



From St. Lawrence Island (Trelease, 1871). 



This species, which seems to belong to the group of B. alpinum Huds. is 

 chiefly characterized by its more acuminate and distinctly denticulate leaves, 

 and by its nerve disappearing below the apex. 

 Bryum leptodictyon Philibert 



Dioicous, gregarious, pale or yellowish-green. Stem erect, simple . 

 4-6 mm. high. Leaves imbricated when dry, erect when moist, the lower 

 smaller becoming larger above, narrowly lanceolate, sublinear, gradually 

 long-acuminate, 1-1.8 mm. long, 35 broad, not decurrent at base, margin 

 plane, entire below, minutely denticulate above: costa narrow, 55// broad at 

 base, percurrent, areolation same as in Webera, with uniform linear cells, 

 median 45-60// long, 5-6 broad. Capsule abruptly pendulous, oblong, small, 

 2 mm. long, 0.8-0.9 broad, pale tapering into a short neck on a flexuous red- 

 dish seta 1.5-2 cm. long. Operculum conical, apiculate. Peristome perfect, 

 teeth red at base, cilia appendiculate. Spores smooth, 9-12//. 



From Hidden Glacier in Russell Fiord (Coville and Kearney, 964). 



Species very distinct, having quite the facies and areolation of a Weber a 

 with the peristome of 

 Bryum heterogynum Philibert 



Dioicous. In low tufts, deep dark red, purple when old, covered with 

 earth at base. Stem erect, radiculous, branching, 5-12 mm. high, leaves erect 

 when dry, erect-spreading when moist, ovate-lanceolate, 1.5 mm. long, 0.5-0.6 

 broad, long-acuminate, cuspidate by the excurrent costa, slightly and acutely 

 denticulate at apex, the margin often bordered, border narrow below plane, 

 broader and distinct above, sometimes subreflexed, rarely wanting; costa 

 narrow, 50-55// at base, gradually attenuate, lower cells rectangular 50-65/^ 

 long, 17-22 broad, median cells oblong-hexagonal, 45-55// long, 13 broad, the 

 marginal narrower, linear, Capsule nodding or pendulous, ovate-pyriform,. 



