Dicranum.] BRYACE^. 71 



Var. plumosum, Lesq. Ilypnoid-plumose in aspect ; tufts 

 very loose ; stems mostly simple, without radicles : leaves longer, 

 nari'ower, open, ilexiious or falcate, denticulate on the borders, 

 rugose on the back. — Dicranodonthim nitidum., James, Bull. 

 Torr. Club, vi. 34. 



II AB. Hocks and bark of living trees, the beech especially, in sub- 

 alpine regions; not rare in the Adirondack mountains. Var. strictius, in 

 depressions on flat rocks, with the variety of D. flagellare {Austin) ; var. 

 plumosum, at Dixville Notch, New Hampshire, under a dam (James). 



11. D. albicans, Bruch & Schimp. Plants densely cespi- 

 tose, yellowish green when moistened, whitish when dry ; stems 

 stout and very long, thickly tomentose : leaves erect or 

 slightly turned to one side, oblong at base, narrowly lanceolate- 

 acuminate, nearly tubulose by the incurving borders ; costa very 

 broad, enlarged at base and filling the whole leaf except a nar- 

 row border; outer perichaetial leaves short-sheathing at base, 

 abruptly lanceolate-subulate and broadly costate, the inner long- 

 sheathing, ecostate : capsule long, cylindrical, smooth ; beak of 

 the lid as long as the capsule, narrowly subulate ; teeth large, 

 densely striolate, papillose above, connate at base, bifid and jier- 

 forated to the middle; annulus simjjle, large. — Bryol. Eur. 

 t. 73. Campt/lojius Shaicii, Wils. 



Hab. Subalpine and arctic regions; Northwestern America (Douglas). 



* * * * Pkuits of large size, radicidose-tomentose to the base 

 of the highest innovations : leaves long, more or less curved, 

 lanceolate-subulate, glossy ; areolation of the basilar angles 

 broadly quadrate: floicers dioecioiis / male buds often j^^'o- 

 dicced on small annual plants from the prothalliwn and 

 mixed in the felt of radicles: capsule long, cernuous^ 

 arcuate. 



12. D. elongatum, Schwaegr. Plants in compact yellow- 

 ish green tufts ; stems very long and slender : leaves open-erect 

 or subsecund, lanceolate-subulate from an enlarged oblong base, 

 very entire, smooth ; costa narrow, vanishing in the apex ; cells 

 of the areolation very narrow, enlarged, quadrangular at the 

 angles : capsule cernuoxTS, gibbous-ovate, substriate, furrowed- 

 plicate when empty ; pedicel pale, comparatively short ; lid pale, 

 long-stibulate, rostrate from a conical base ; annulus simple, nar- 

 row. — Suppl. i. 171, t. 43 ; Bryol. Eur. t. 76. B. Macouni, 

 Aust., Coult. Bot. Gaz. ii. 96, sterile specimens. 



