BARNES NORTH AMERICAN MOSSES. 307 



median and comal leaves longer attenuate, denticulate sometimes below 

 middle, narrowly areolate, costa thick, canaliculate and excurrent, comal 

 revolute at borders, only lowest shorter and short-decurrent: peristome 

 pale; lid low and flat. Mac. Cat. 113. On rocks: Vesuvius Bay, Salt 

 Spring Island, Gulf of Georgia, B. C. 



2 72. Webera microcanlon C. M. & Kindb. Resembling a small form of 

 W. polymorpha in the very short stem and acute leaves agglomerate in 

 small buds: differs principally in dioicous inflorescence and very large 

 spores, when unripe about 0.03 mm. Capsules (not ripe) short obovate, an- 

 nulate; neck short; lid low mamillate; pedicel straight, arcuate at apex: 

 comal leaves scarcely revolute at borders, inner perichaetial much shorter: 

 tufts very compact; leaves green or finally blackish. Mac. Cat. 114. 

 Digges Island, Hudson Strait. 



278. Webera subcucullata C. M. & Kindb. Habit of Mielichhoferia 

 nitida: intermediate between W. cueullata and W. pycnodecurrens: 

 resembles the last in small compact tufts, small (unripe) short-necked cap- 

 sule, and mamillate lid; but stems subjulacous, leaves dull green, densely 

 crowded, not decurrent; lower leaves short, sub-obtuse, nearly as in W. 

 cueullata but leaf cells narrower. Mac. Cat. 113. Crevices of rocks: 

 Mount Queest, Gold Range, B. C. 



274. Webera Ludwigii Sch. Dioicous: soft, laxly cespitose, red or 

 blackish at the base, dark green above, scarcely glossy when dry: stem and 

 branches purple, erect, slender, sparingly radiculose: lower leaves remote, 

 broadly ovate, obtuse, entire, more crowded upward, erect spreading, long 

 decurrent, not carinate; comal leaves densely crowded, oblong-lanceolate, 

 serrulate at apex; margin narrowly recurved, nerve purple, vanishing be- 

 low apex, thick at base; cells rather lax, thin, rhombo-hexagonal above, 

 more rectangular at base: capsule on a flexuose reddish seta suddenly bent 

 below capsule, sub-pendulous, oval-pyriform, brownish, annulate, slightly 

 constricted below mouth; lid conical, obtuse, apiculate; peristome pale 

 yellow, teeth linear-lanceolate, basal membrane of endostome reaching 

 middle of teeth, processes gaping at keel, cilia 2-3. Brit. Moss Flora 2: 

 154 asPohlia. Oregon; Cascade Mts. and Gold Range, B. C.; Greenland. 



275. Webera gracilis De Not. Dioicous: much more slender than W. 

 commutata, in loose, yellow green, glossy tufts, blackish at base, with 

 many rigid filiform shoots, short in fertile plants, elongated and often 

 with red [axillary gemmae in sterile: leaves erect, appressed when dry, 

 rigid, ovate and ovate-lanceolate, short-pointed, without chlorophyll; 

 margin plane, faintly serrate at apex; nerve thinner, lost at or below point: 

 capsule turgidly ovate, cernuous, small, reddish brown; lid orange, hem- 

 ispherical, apiculate. Braithw. Brit. Moss Flora 2: 154. Oregon. 



276. Webera micro-denticulata C. M. & Kindb. Tufts dense, glossy 



