— 52 — 



moist; inner subsheatliing, hyaline in the lower half; seta lo-ii mm, long, 

 capsule erect, oblong cylindric. Other parts lacking. 

 From Juneau (Trelease, 2179, 21 Si). 



This moss has the aspect of a slender B.fallax Hedw.: but the texture 

 of the leaf base, form of rectangular subhyaline cells, clearly separate it. 

 On the other hand, it differs from B. vinealis Brid and allied forms by the 

 much shorter leaves. 



Barbula rigens Card, and Ther. 



Reddish, loosely csespitose or intermixed with other mosses; stems 

 slender, erect, rather rigid, divided, 1-2 cm. high, leaves somevv^hat crispate 

 when dry, erect-open when moist, shortly linear-lanceolate. 1.25 to 1.5 x o. 3 

 mm., margins entire (somewhat revolute towards the middle); costa strong 

 of nearly the same thickness throughout (56/O. biconvex, percurrent or 

 excurrent into a short mucro; lower leaf cells rectangular, hyaline, smooth 

 for the most part, upper cells opaque, indistinct, round- quadrate, densely 

 papillose on both sides, median about wide. Other parts lacking. 



From Orca (Trelease, 2260; mixed with DisticJiiiiin capillaceum and 

 Anoectangiuvi compact it)ii). 



This species belongs to the group of B . rigidiila Mitt., from which it is 

 easily distinguished by its stiff stem and leaves, the latter being shorter and 

 very briefly acuminate and by its much more papillose areolation. 

 RiiACOMiTRiUM suDETicuM Alai.kanum Card, and Ther. 



A small form with the habit of var. tenellum Boul., but with hyaline 

 apex nearly or quite lacking and the costa more distinct. 



Hidden Glacier Inlet, Yakutat Bay (Trelease, 2508 in part). 

 Rhacomitrium cyclodictyon Card, and Ther. 



Dioicous ? Small, densely Cccspitose, dark brown, stem depressed, very 

 freely branching erect short, 3-5mm. long. Leaves when dry suberect, 

 scarcely flexuous, erect open when moist, i 25mm. long, by o 5mm. broad, 

 muticous, entire lower margin revolute. costa rather slender, 35-40// wide, 

 vanishing a little below the apex, areolation subequal, a few of thelower cells 

 next the costa rectangular or sublinear, not sinuous, all the others round or 

 shortly ovate, 8-12/^ wide, marginal cells incrassate, smooth or strangely 

 convex so as stimulate large papillae. Perichfetial leaves much larger from 

 a sheathing base, gradually long acuminate, erect when moist. Seta short, 

 purple becoming blackish and twisted to the left when dry. Capsule 5mm. 

 long, erect, narrowl}^ cylindric, 1.5mm long, by 0.3 thick. Spores minutely 

 granulose, 16-17//. The rest unknown. 



From Muir Glacier (Trelease, 2431). 



A most remarkable species which cannot l:)e mistaken for any other on 

 account of its characteristic areolation very different from that of all known 

 species of the genus Rhacomitrium. 

 Ulota Alaskana Card, and Ther. 



Differs from the closely allied U. crispa Brid. at first sight in its size 

 and more robust habit (stem 2-4cm. high, freely branching), seta longer 



