CATALOGUE. 3438 
Hab.—Twin Lakes, on damp rocks; not common. 
DesmaTopon LaurRERI, var. OVALIS—A smaller plant, with broader 
leaves and larger, oval, nodding capsule, on a much shorter, upright, and 
slightly flexuose pedicel 
Hab.—Twin Lakes, on shaded ground. 
BarBULA MUCRONIFOLIA, Schweeg. 
Hab.—Twin Lakes, on rocks; also a variety with a short mucro, simi- 
lar to a variety of B. subulata, Brid. 
BaRBULA RURALIS, Hedw. 
Hab.—Twin Lakes, on rocks; common. 
GrimM1A ApocarPa, Hedw. 
Hab.—Twin Lakes, on rocks; common. 
GRIMMIA PLATYPHYLLA, Mitt.—Distinguished from the above by its 
leaves being obtuse and more than twice as wide, imbricated when dry ; 
the younger leaves terminating with a very short diaphanous apiculus; the 
pericheetial leaves very laxly areolate for two-thirds of theta length; the 
capsule large and immersed. 
Hab.—Twin Lakes, on rocks; rare. 
Grimmra anopon, Brch. & Schp.—An interesting species, recognized 
by its small hoary cushions of dark green at the surface, leaves ending in 
a long hairy point, and the sa gymnostomous, immersed capsule strongly 
ventricose. 
Hab.—Twin Lakes, on dry rocks; not common. 
GrImMMIA ovata, Web. & Mohr. 
Hab.—Twin Lakes, on exposed rocks on mountain sides. 
GRIMMIA OVATA, var. #. AFFINIS, Brch. & Sch. 
Hab.—In like situations. 
Gromia cALypTRATA, Hooker.—In dense cushions; stem branched ; 
the upper erect leaves ending with a long, slender, piliferous point, the 
cylindrical capsule covered with the large calyptra when mature. 
Hab.—Twin Lakes, on dry rocks; not common. 
Hepwiclia CILIATA, var. LeuUcopHzA, Brch. & Schp—This variety is 
known by its ciliated, long, diaphanous points to the leaves. 
-ORTHOTRICHUM TENELLUM, Bruch.—In small cushions, with short, 
