342 BOTANY. 
DicranuM RrHABDOCARPUM, Sulliv.—Densely czspitose; stems dicho- 
tomously branched ; leaves erect, concave, elongate-lanceolate; nerve van- 
ishing below the apex; areolation loose; of a light shining green; capsule 
erect, cylindrical, regular, when dry 5- to 8-ribbed; no annulus; operculum 
obliquely rostrate. 
Hab.—Mount Graham, Arizona, on rotten pine logs; rare. 
Potria Herm, Hedw.—Tufted plants with flexuose oblong-lanceolate 
leaves, serrated at the apex, with a plane margin and nerve ceasing below 
the point; capsule oblong, and remarkable for the rostrate operculum adher- 
ing to the columella beyond the mouth of the capsule. 
Hab.—Twin Lakes, on shaded ground. 
DipyMopon RuBELLUS, Bry. Eur.—Leaves intense dull green; lower 
ones invariably reddish, by which feature it is readily recognized. 
Hab.—Twin Lakes, on wet banks; not rare. 
DisticuiumM caPILLaceuM, Bry. Eur. 
Hab—Twin Lakes, on wet rocks on hillsides. 
DisTICHIUM CAPILLACEUM, var. BREVIFOLIUM—A smaller plant, with 
shorter leaves and smaller capsule. 
Hab.—South Park, in wet, grassy ground. 
DisticHIuM INCLINATUM, Swtz., B. & S.—The shorter stem, more 
crowded leaves, and inclined oval capsule distinguish this from the preceding. 
Hab—Twin Lakes, in similar situations. 
CERATODON PURPUREUS, Brid. 
Hab.—Twin Lakes, Mount Graham, and Sierra Blanea, Arizona; very 
common. 
CERATODON PURPUREUS, var. compactuM—In large, compact czespites, 
in a barren condition. 
Hab.—Twin Lakes, in very wet or boggy ground. 
Desmatopon Latirouius, Bry. Eur. 
Hab.—South Park, along streams. 
Desmatopon Lavrert, Schultz—In close, czespitose tufts, stems 
branched, leaves crowded, oblong, obtuse, denticulate, with revolute, re- 
flexed margins; curved oval capsule, supported by a long, arcuate or cyg~ 
neous pedicel. 
