— 7 - 
narrower, 2.2 mm. long, 0.8 mm. broad, lanceolate, a'cuminate, acute, less 
decurrent, costa percurrent or shortly excurrent; margins all entire and revo- 
lute from the base to near the apex ; cells quadrate, short-rectangular or 
rhomboidal, 30/^ long, 14/4 broad, slightly chlorophyllose, with thick walls, 
marginal cells narrower and linear. Perichaetial leaves smaller, narrower* 
acute ; costa shortly excurrent. Capsule nodding or pendulous, narrowly sub- 
pyriform, 3 mm. long, 0.9 mm. thick, slightly constricted under the mouth both 
when wet and when dry; operculum concave-conic. Seta dark reddish-brown 
about 2 cm. long. Annumus broad, triple. Membrane of the inner peristome 
high, cilia 2-3 appendiculate. Spores smooth, unequal, some frequently ii/i 
in diameter, others more rarely 18 /j. in diameter. Male plants unknown. 
Plate XIX. 
N. W. Montana: Mt. Lottie Stanton and Mt. Trilby, in the vicinity of 
Lake MacDonald, Flathead Co., 1100-1800 alt. (J. M. Holzinger and J. B. 
Blake, 1898). 
Belongs to the group of B . pseudotriquetrum Schw. , but is at first sight 
distinguished from all the other species of this group by its dimorphous 
leaves. 
Aulacomnium palustre Schw. var. dimorphum Card. & Ther. 
Stems densely branched above. Leaves dimorphous, stem leaves 
elongated acutely acuminate, apex sinuate, subdenticulate, strongly papil- 
lose ; branch leaves much shorter, obtuse, entire, less papillose, sometimes 
smooth. 
Colorado: Near Breckenridge, 175 km. from Denver, alt. 3000 m. (J. M. 
Holzinger, 1896). 
A similar form is recorded by Mr. Dixon in his admirable Handbook of 
British Mosses, p. 282. 
Aulacomnium palustre Sch. var. lingulatum Card. & Ther. 
Slender, in the larger forms similar to A. androgynum. Leaves lingu- 
late, all obtuse, entire or faintly sinuate at the apex. 
Colorado: Bog near Chamber’s Lake (C S. Crandall, 1894; herb, J. M. 
Holzinger). 
Distinguished from the var. imbricatum Br. Eur. by its smaller size and 
its longer not imbricated leaves. 
Fontinalis subcarinata Card. 
Soft, yellowish or dirty green. Stems 1 5-20 cm. long, denudate in the lower 
part ; branches elongated, erect, attenuate, subcuspidate. Leaves soft four- 
ranked, erect, 4-5 mm. long, 1-2 mm. broad, narrowly lanceolate, long acumi- 
nate, , entire or subdenticulate at the apex, nearly all distinctly sulcate in the 
middle, the lateral leaves subconduplicate; cells very long and narrow, the 
alar cells few, small, hardly distinct, often nearly wanting. Other charac- 
ters unknown. Plate XXIII. 
Assinoboia: Cypress Hills, Battle Creek (Macoun, 1895. Sent as F. 
Lescurii). 
This species belongs to the Sect. Malacophyllae , and is closely allied to 
