back; areolation small, oval or fusiform-angular; parapbyllia
none. Flowers dioecious. Capsule sliort-oval, turgid, abruptly
curved downward at tbe base of the inflated collum. Pedicel
smooth or rough. Operculum conical, constricted into a short
point. Teeth closely articulate; segments split between the
articulations ; cilia two or three, long.
Related to Thuidium in the papillose areolation and the form of the
leaves ; to Eurhynchium in the absence of paraphyllia and tlie character of
the peristome; differing from both in tlie form of the capsule and lid.
19. H. leuconeurum, Sulliv. & Lesq. Plants yellowish
green, glossy ; stems slender ; branches short, appressed ; leaves
open, erect, costato to the apex ; the perichætial ovate-lanceolate,
long filiform-acuminate, ecostate; areolation minute, scarcely
longer toward the base: capsule ovate, horizontal; pedicel
curved, smooth; operculum long-conical, apiculate or short-
rostellate; segments punctulate; intermediate cilia three, not
h,alf as long as the segments ; annulus large. —Muse. Bor.-Amer.
Exsicc. (ed. 2), n. 407»; Sulliv. Icon. Muse. 102, t. 80. Thuidium
leuconeurum, Lesq. Mem. Calif. Acad. i. 31.
H a b . On trunks of Quercus agrifolia and on moist soil of shaded
hills; Oakland, California (Boiandtr) ; Coeur d’Alene Mountains N W
Montana ( Watson). ’
20. H. W h ip p le a n um , Sulliv. Plants small, dirty green,
prostrate ; stems irregularly divided ; primary branches long,
flexuous, pinnately ramulose, attenuate, flagelliform, radiculose
at the apex : leaves erect-spreading, those of the stem deltoid,
coidate at base, those of the branches narrower, all long-acuminate,
dentate, serrate all around, costate to the apex ; areolation
minutely quadrate-oblong; perichætial leaves ovate, gradually
narrowed into a slender flexuous point, costate to below the
point, capsnle abruptly inclined from a short neck, ovate, on
a tuberculose flexuous pedicel ; operculum conical, constricted
in the middle, apiculate ; segments splitting, separated by two
cilia as long as the segments. — Pacif. R. Rep. iv. 190, t. 9.
H a b . Coast ranges near San Francisco (Bigelow).
The species is closely allied to H. leuconeurum, differing essentially in
the roiigli pedicel, the absence of annulus, and the cilia, which are only
two and of twice the length.
21. H. ram u lo sum , Hampe. Stem thickish, simply pinnate;
branches short,unequal,bright green: stem-leaves densely
crowded, erect-spreading, soft, broadly cordate, snbdecurrent-
auriculate at base, abruptly narrowed into a crenulate hyaline
piliferous point ; costa whitish, vanishing below the apex ; areolation
of minute rounded slightly papillose cells ; perichætial
leaves broadly ovate, erose-deiitate, long and narrowly acuminate,
denticulate, narrowly costate, loosely reticulate : capsule
small, horizontal, turgid, oblong, pale, on a short rough purpli.sh
pedicel ; operculum conical, obliquely rostellate ; segments
yellowish, split ; cilia two ; annulus large. — Muell. Syn. ii. 480.
H a b . Cape Disappointment, Washington Territory.
22. H. crispifolium, Hook. Stems pinnately and bipinnately
much divided, dirty yellow: leaves densely imbricate,
yellowish green, opaque, subfalcate-secund ; those of the stems
deltoid-ovate, attenuate into a long crispate point, undulate-
rugose, soft, thickish, decurreut at base, minutely areolate,
strongly nerved ; branoh-leaves narrower, ovate-lanceolate ; the
perichætial erect, lanceolate, gradually narrowed to a long flexuous
point, ecostate, serrulate : capsule oval-oblong, horizontal ;
pedicel purplish, rough; peristome of EwhyncMum. — Muso.
Exot. t. 31.
PlAB . Shaded ground and rocks, Northwestern America (Menzies);
Vancouver Isiand (Wood); Caiifornia (Bolander, Watson); Fort Colviiie
{Watson).
23. H. laxifolium, Schwaegr. Stems long, creeping, prostrate
and rigid ; branches and branchlets bright green ; stem-
leaves loosely imbricate, ojten-erect, deltoid, ovate and clecur-
rent at base, aouminate, serrate or denticulate ; branch-leaves
narrower ; costa vanishing in the apex ; perichætial leaves
oblong, sheathing, erect, long flexuous-acuminate, denticulate at
the apex, ecostate : capsule globose-ovate, horizontal on a short
red tubercular pedicel ; operculum conical, acuminate ; peristome
as in the preceding. — Suppl. ii. 1. 159, t. 148; Brid.
Bryol. Univ. ii. 464. Leslcea laxifolia. Hook. Muse. Exot. t. 30.
Lsothecium laxifolium, Brid. 1. c. 359.
H a b . Northwest coast of America (Menzies).
S u b g e n u s V. ELODIUM.
Stems villous, ascending, 2-3-parted, distantly and pinnately
ramulose; branches subcompressed. Leaves lanceolate-acuminate,
striate, not papillose; areolation elongated, rhomhoidal;