— so — 



shorter and proportionately wider capsule, its longer and more finely beaked 

 lid. its shorter and more briefly acuminate leaves, and finally by its areola- 

 tion formed of larger and less obscure cells. 



Trichostomum cuspidatissimum Card, and Ther. 



Dioicous, compactly caespitose, brownish yellow, stems erect, about 

 5 cm. high, densely foliate, reddish tomentose; branches numerous, erect: 

 leaves crispate when dry, erect-arcuate when moist, clustered at the apex 

 of the stems and branches, fragile (apex often broken off) from an ovate 

 base gradually long acuminate: 3-3.5 mm. long, 0.45-0.7 wide, margins 

 plane, inflexed above, crenulate with prominent papillae, costa narrow, 

 80-90/^ wide at base, long excurrent into a very acute cuspidate apex, lower 

 cells rectangular 5-6:1, yellowish, upper mostly quadrate, io-i2/^ wide, 

 opaque, strongly papillose. Sterile. 



From Hall Island (Brewer and Coe, 674). 

 • A fine species, easily distinguished from the large forms of T. niutabile 

 Bruch, and its variety citspidatuui Limpr. {T. ctispidatum Sch.), by the 

 form of its leaves, and more particularly by its narrower costa and its upper 

 cells which are much larger and more distinct (io-i2/< instead of 6-8). 



Trichostomum Sitkanum Card, and Ther. 



Dioicus (?). In somewhat dense tufts, above green, blackish within, 

 covered with earth below stems 2-3 cm. high, little divided, loosely foliate. 

 Leaves soft, cirrate-crispate when dry, patulous when moist, the lower 

 2.5-3 mm. long, upper longer, 4-4.5 mm., long, linear lanceolate from a long 

 .subsheathing base, margins plane and entire, costa quite strong, about 

 110/^ wide at base, excurrent into a short, yellowish mucro, cells of the sub- 

 sheathing base rectangular, hyaline 4-6:1; others quadrate, -hexagonal, 

 12-14/^ wide, strongly papillose: other parts lacking. 



From Sitka (Trelease, 2370). 



The aspect, the form of leaves, the looser basal areolation and the upper . 

 cells more papillose, easily distinguish this plant from T. cuspidatissi?num 

 Card, and Ther. It is more closely connected with T. Bainbergeri^oh., but 

 the latter has the costa shining on the back in a dry state, and the hyaline 

 cells of the base going up along the borders of the leaf, as in Barbula tor- 

 tjiosa Web. and Mohr. 



Barbula brachypoda Card, and Ther. 



Monoicus, laxly casspitose, green, stems 5-10 mm. high, erect, simple or 

 div'ided, leaves soft, erect when dry. erect-open when moist, elliptic or sub- 

 spatulate. 2.5-3 mm. long, 0.6-1 mm. broad, broadly and shortly acuminate, 

 obtuse, subobtuse or acute, margins revolute from base to middle, thence 

 plane and bordered with three or four rows of yellowish cells; costa narrow 

 (5o/^), vanishing a little below the apex: areolation smooth, the cells in the 

 lower half very lax, hyaline, rectangular, 66-88 X about 22/^ strongly chloro 

 phyllose; above, cells irregular roundish-quadrate or very short rectangular, 

 gradually smaller from costa to margin (larger, 25 x i6//- smaller, quadrate 

 I4/Z wide); antheridial buds below the archegonial; pericha;tial leaves larger 



