328 BRYACE^. [Uypnum. 



back; areolation small, oval or fusiform-angular; paraphyllia 

 none. Flowers dicEcious. Caj3sule short-oval, turgid, abruptly- 

 curved downward at the base of the inflated collum. Pedicel 

 smooth or rough. Operculum conical, constricted into a short 

 point. Teeth closely articulate ; segments split between the 

 articulations ; cilia two or three, long. 



Eelated to Thiddium in the papillose, areolation and the form of the 

 leaves; to -Eitr/iync/zium in the absence of paraphyllia and the character of 

 the peristome; dilfering from both in the form of the capsule and lid. 



19. H. leuconeurum, SuUiv. & Lesq. Plants yellowish 

 green, glossy ; stems slender ; branches short, appressed : leaves 

 open, erect, costate to the apex ; the perichretial ovate-lanceolate, 

 long filiform-acuminate, ecostate ; areolation minute, scarcely 

 longer toward the base : capsule ovate, horizontal ; pedicel 

 curved, smooth ; operculum long-conical, apiculate or sliort- 

 rostellate ; segments punctulate ; intermediate cilia three, not 

 half as long as the segments ; annttlus large. — Muse. Bor.-Amer. 

 Exsicc. (ed. 2), n. 407"; Sulliv. Icon. Muse. 102, t. 80. Thu- 

 idmm leuconeurwn, Lesq. Mem. Calif. Acad. i. 31. 



Hab. On trunks of Querciis acjrifolia and on moist soil of shaded 

 hills; Oakland, California {Bolander); Coeur d'Alene Mountains, N. W. 

 Montana {Watson). 



20. H. Whippleanum, Sulliv. Plants small, dirty green, 

 prostrate ; stems irregularly divided ; primary branches long, 

 flexuous, pinnately ramulose, attenuate, flagelliform, radiculose 

 at the apex : leaves erect-spreading, those of the stem deltoid, 

 cordate at base, those of the branches narrower, all long-acu- 

 minate, dentate, serrate all around, costate to the apex ; areola- 

 tion minutely quadrate-oblong ; pericha^tial leaves ovate, gradu- 

 ally narrowed into a slender flexuous point, costate to below the 

 point : capsule abruptly inclined from a short neck, ovate, on 

 a tubercnlose flexuous pedicel; operculum conical, constricted 

 in the middle, apiculate ; segments splitting, separated by two 

 cilia as long as the segments. — Pacif. R. Rep. iv. 190, t. 9. 



Hab. Coast ranges near San Francisco {Bigelow). 



The species is closely allied to H. leuconeurum, differing essentially in 

 the rough pedicel, the absence of annulus, and the cilia, which are only 

 two and of twice the length. 



21. H. ramulosum, Hampe. Stem thickish, simply pin- 

 nate ; branches short, unequal, bright green : stem-leaves densely 



