90 BRYACE^. [Conomitrlum. 



2. 0. Hallianum, Sulliv. & Lesq. Plants very small and 

 slender, in loose floating dirty green sparingly divided tufts : 

 leaves distant, long-linear, gradually tapering to a blunt apex ; 

 dorsal wing descending to the middle; areolation loose, in 

 broader ovate angular cells, narrower toward the borders: flowers 

 terminal on long branches : calyptra longer, descending to below 

 the orifice of the capsule, split on one side : capsule longer- 

 pedicellate, oval-oblong, with the borders of the orifice flat; lid 

 conical-rostrate, slightly inclined, nearly as long as the capsule ; 

 teeth long, entire, not cleft and without a divisural line, nar- 

 rowly lanceolate, obscurely articulate, yellow, attached at a 

 distance below the orifice. — Aust. Muse. Appal, n. 108; Sulliv. 

 Icon. Muse. Suppl. 43, t. 28. 



Hab. On decayed wood in wells, Illinois {E. Hall), fertile; on shaded 

 rocks, New Jersey (Austin), sterile. 



SuBTRiBE II. LEUCOBRYEJE. 



Plants whitish, spongy like Sphagnum^ soft when moist, 

 brittle when dry, densely cespitose. Leaves close, composed, 

 except on the borders, of two or three superposed layers of 

 large porous chlorophyllose cells separated by a layer of inter- 

 cellular simple narrow chlorophyllose ones. Calyptra large, 

 whitish, Caj^sule, peristome and operculum as in Dicranuni, 

 or the peristome of 8 short broad lanceolate teeth. 



27. LEUOOBRYUM, Hampe. (PI. 2.) 



Capsule, peristome and lid as in Dicranum. Flowers 



dioecious. 



1. L. vulgare, Hampe. Ramification dichotoraous and 

 fastigiate : leaves oblong-ovate, half-clasping at base, lanceolate, 

 tubulose from the middle upward : capsule oblong-ovate, with 

 a distinct substrumose collum, slightly gibbous below the orifice, 

 small, chestnut-color, black when old, plicate-furrowed when 

 dry ; lid long-subulate-beaked, curved doAvnward. — Linnsea, 

 xiii. 42. JBryum glauciim, Linn. Spec. PI. 1118. Dicranum 

 glaucum, Auct. Oncophorus glaucus, Bryol. Eur. t. 97 and 

 98. Leucohryum glaucum, Schimp. ; Sulliv. Mosses of U. 

 States, 23. 



