CATALOGUE. 349 
Hypnum commutatoum, Hedw. 
Hab.—Twin Lakes, in wet places. 
HypnuM cCoMMUTATUM, var. #. FaALcATUM, B. & S. 
Hab.—Twin Lakes, in similar situations. 
Hypnum REPTILE, Michx. 
Hab.—Mt. Graham, Arizona, on old rotten pine logs. 
STEREODON PLICATILIS, Mitten.—Dioicous, fastigiately branched ; leaves 
faleate, secund, broad, ovate-acuminate, when dry rugulose-subplicate, two 
very short nerves ; margin reflexed, entire, on those of the branches serrulate 
at the points, the cells at the angles small and obscure; pericheetial leaves 
erect, elongated, interior broad, oblong-lanceolate, subulate, entire, plicate. 
Capsule on an elongate pedicel, cylindrical, erect at the base, curved above ; 
operculum conic; peristome light color. 
Hab.—Twin Lakes, on old logs. 
STEREODON COMPLEXUS, Mitten.—Dioicous, cxespitose; branches pinnate; 
leaves secund from a broad base, ovate-lanceolate, circinate, concave, two 
small nerves; margin subentire, many short, obscure, subquadrate cells at 
the basal angles; pericheetial leaves erect, oblong, subulate, interior sud- 
denly subulate, subserrate, plicate; capsule on a red pedicel, cylindrical, 
unequal, inclined ; persistome yellow; operculum conic. 
Hab.—Twin Lakes, on shaded rocks. 
LIMNOBIUM PALUSTRE, Linn. — 
Hab.—Twin Lakes, at the base of trees at the water's edge. 
LIMNOBIUM PALUSTRE, var. SUBJULACEUM. 
Hab.—Twin Lakes, in like situations. 
LimNnosBiuM ocHRACEUM.—Turn. 
Hob.—Twin Lakes, on wet ground. 
CAMPTOTHECIUM NITENS, Schreb. 
Hab.—Twin Lakes, among grass in meadows. 
