16. W . p u lch ella, Schimp. 1. c. Closely allied to the last,
differing especially in the reddish color of the more divided
shorter stems, the shorter leaves with more compact areolation,
the perigonial broader and ovate-lanceolate, and the perichætial
distinctly serrate, the capsule longer, with the pedicel erect at
base, aud the annulus not revoluble but remaining attached to
the lid. — Bryum pulchellum, Hedw. Muso. Frond, iii. 96, t. 38 ;
Bryol. Eur. t. 352.
Hab . Very rare in North America. Found only in the Cascade Mountains,
British Columbia (Macoun).
17. W . Tozeri, Schimp. 1. c. Plants small, loosely cespitose,
pale green, soft, mostly simple : lower leaves distant, obovate,
acuminate, decnrrent at base ; costa none in the lowest
leaves, decnrrent at base and produced to the middle in the
upper ; upper leaves closer, narrower and longer, the perichætial
smallest, entire, bordered by a reddish or dark green margin
composed of two or three rows of narrow cells ; areolation
large, loose, rhotnhoidal-hexagonal : male plants smaller ; perigonium
small, ovoid, the inner leaves lingulate, acuminate, red;
capsule pendent, on a fleshy jjedicel, arcuate at top, ovate,
regular, short-necked, soft, passing by age from pale dirty
yellow to brown, shorter and slightly constricted under the
broad orifice when dry ; lid comparatively large, whitish, convex
conical, mamillate ; teeth smaller, pale yellow, the inner
segments thin and hyaline ; annulus compound, detaching by
fragments. — Bryum Tozeri, Grev. Scott. Crypt. FI. v., t. 285 ;
Bryol. Eur. t. 353.
H a b . Clayey ground, borders of ditches and roads; Southern California
(Bigelow, Bolander).
18. W . a lb ic an s, Schimp. 1. c. Tufts soft, glaucous-
green : stems simple, 2 to 8 c.m. long or more, erect or inclined
below, reddish or dark purple : lower leaves ovate, ohlong,
acuminate, the upper oblong-lanceolate, soft, yellowish or pale
green ; costa vanishing below the serrate apex ; areolation narrowly
hexagonal-rhomhoidal : male plants simple or sometimes
branching from under the flower-hearing apex ; male flowers
discoid ; external perigonial leaves broad and concave at base,
open and lanceolate above, the inner gradually smaller, bearing
many antheridia and paraphyses in the axils ; capsule inclined
or pendent, short-pyriform, inflated at the short collum, glaucous
green, becoming brown hy age, small in proportion to the
size of the plants, subglobose and truncate or turbinate and
wide-mouthed when empty ; pedicel long, generally reddish and
geniculate at base : teeth of the large peristome orange-colored ;
annulus none. — Mnium albicans, Wahl. FI. Lapp. 853. Bryum
Waldenbergii, Schwaegr. Suppl. i. 2. 92, t. 70 ; Bryol. Eur.
t. 354 ; Sulliv. Mosses of U. States, 45.
Var. n ig ric a n s. Plants short, dirty black, in more compact
tufts : leaves longer, narrower ; areolation pellucid.
Hae. Wet sand, borders of springs and rivulets. The variety on per-
peiidicular limestone rocks, California (Bolander).
19. W . Bigelovii. Plants long and slender, loosely cespitose,
repeatedly branching by innovations, ramulose from the
apex : lower leaves on the stems and branches small and distant,
gradually larger upward, open-erect, oblong-ovate (the comal
lanceolate-acuminate), concave, nearly entire or obtusely denticulate
and flat on the borders ; costa thick, percurrent or
vanishing below the apex : male flower terminal, gemmiforrn or
capitate : capsule long-pedicellate, inclined or pendent, pyri-
form-elliptioal ; teeth closely articulate, the inner segments split
open, separated by three simple smooth cilia. — Bryum Bigelovii,
Sulliv., Pacif. R. Rep. iv. 187, t. 5.
Hab. Banks of streams above Sonora, at the base of the Sierra Nevada
(Bigelow).
The peristome is not described by the author. He remarks that the
yellowish green foliage, the shorter, more obtuse and nearly entire leaves
with close areolation, the less obovate capsule, and the capituliform male
flowers separate this species from W. albicans, its nearest congener. The
species is hy this affinity, or by the characters of the peristome, a Webera.
But the areolation and the form of the leaves seem to refer it to Bryum.
8 5 . BRYUM, Dill. (PI. 4.)
Plants perennial, radiculose. Leaves with a solid round
costa, generally excurrent ; cells of the areolation rhomboidal-
hexagonal, smooth, loose, solid. Flowers bisexual, monoecious
or dioecious, the male gemmiforrn, rarely discoid. Calyptra
narrowly cucullate, falling off before the ripening of the capsule.
Capsule on a long stout pedicel, pyriform and passing
into a solid stomatose collum, regular or rarely slightly incurved,
coriaceous. Lid convex, papillate. Peristome double ;