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8, of a double row of cells, equal in length. — Orthotrichum
curvifolium, Wahl. FL Lapp. 363 ; Bryol. Eur. t. 226. Weissia
curvifolia, Lindb. I. c.
IIab. Canada [Drummond, fide Scliimper).
As in the case of U. Drummondii, we have been unable to find this
species in any of our sets of Drummond’s mosses.
4. U. Bruchii, Hornsch. Leaves linear-lanceolate from an
enlarged ovate concave base, long, flexuous, twisted when dry ;
perichætial leaves erect, sulcate lengthwise at base; basilar
cells long and narrow, vermicular, thick-walled; those of the
borders enlarged, quadrate : calyptra deeply split, very hairy :
capsule exserted on a long pedicel, oval, long-necked, 8-striate,
pyriform and narrowed at the orifice when empty ; teeth long,
higeminate, reflexed when dry ; cilia 8, rarely 16, filiform, as
long as the teeth, or when 16 alternately longer and shorter. —
Brid. Bryol. Univ. i. 794. Orthotrichum coarctatum, and 0.
dilatatum, Bruch & Schimp., Bryol. Eur. t. 227. O. Bruchii,
Wils. Bryol. Brit. 188, t. 45; Sulliv. Mosses of U. States, 34.
Weissia Bruchii, Lindb. 1. c.
H a b . AVhite Mountains {Oakes); Upper Canada {Drummond).
Similar to 0 . crispum, but more robust, the leaves less crispate, rather
twisted W'hen dry, the capsule larger, contracted and narrowed at tlie
mouth when dry.
5. U. c risp a , Brid. Tufts soft, yellowish green on the
outside, ferruginous within : leaves similar to those of the last
species, crispate when dry : calyptra very hairy : capsule oval,
with a very long collum descending to near the base of the
short pedicel, constricted under the orifice, much lengthened,
fusiform, deeply sulcate when dry and empty; teeth 8, confluent,
rarely separated into 16, lanceolate ; dividing line distinct
; cilia 8, stouter and shorter than in the last. — Muse.
Recent. Suppl. iv. 112. Weissia ulophylla, Ehrh. Beitr. i. 191.
Orthotrichum crispum, Hedw. Muso. Frond, ii. 96, t. 35 ; Bryol.
Eur. t. 228 ; Sulliv. 1. o.
Var. m in o r. Plants smaller; leaves suhovate at base.—
U. intermedia, Schimp. Syn. (ed. 2) 305?
Hab. Trunks and branches of trees on mountains; not rare. The
variety near Lake Huron, British America (Drummond, n. 153).
6. U. A m e ric an a , Mitt. Differing from U. crispa only in
its shorter stem, the leaves twisted-crispate (not appressed-
twisted, as described by the author), the base of the leaves suboval,
not generally as enlarged as in IT. crispa, resembling in
that point those of B. crispula. — Journ. Linn. Soo. viii. 26.
Hab. Lake Huron (Todd); British America (Drummond, n. 153, with
U. Bruchii).
As compieting the diagnosis of the species, the author says that the
ceils in tlie middle of the lanceolate part of the leaves number three
within the tliousandth part of an inch, and only two in U. crispa, and
two and a half in U. crispula. In tlie plants we have examined from
Drummond’s sets, the corresponding cells of U. americana are generally
broader than in U. crispa. The borders of the leaves also are flat and
entire, not recurved nor suberose as described by Mitten. Specimens are
frequently much mixed in the Drummond sets, and it appears that in our
sets, at least, n. 153 merely represents a variety of ¡7. crispa, apparently
the U. intermedia of Scliimper.
7. U. c risp u la , Brid. Differing from IT. crispa in its
smaller size, the green color of the tufts becoming ferruginous
or brown with age, the leaves a little shorter and broader, more ,
twisted-crispate when dry, the capsule shorter and with shorter
neck, thin, more narrowly striate, pale yellow, shortened pyri-
form-trunoate and open-mouthed or slightly contracted under
the orifice when dry and empty, and in the shorter teeth. —
Bryol. Univ. i. 793. Orthotrichum crispulum, Bruch; Bryol.
Eur. t. 228 ; Sulliv. Mosses of U. States, 34. Weissia crispula,
Lindb. 1. c.
Ha b . Witli the former, but more common; plains and hilly districts
of the middle and northern zones..
8. U. p h y ila n th a , Brid. Densely tufted, greenish brown;
leaves long, linear-lanceolate, much twisted and beautifully cir-
einate ; costa percurrent, often thickened and bearing at the
apex an agglomeration of small brown articulate cylindrical
bodies : flowers and fruit unknown. — Muse. Recent. Suppl. iv.
113. Orthotrichum phyllanthum, Steud.; Bryol. Eur. t. 223.
0. fascictdare, LaPyl.; Brid. Bryol. Univ. i, 790. Weissia
phyilantha, Lindb. 1. c.
Ha b . Trunks of trees, Oregon (E. Hall); Vancouver Island (Wood);
Newfoundland (LaPylaie).
* * * Leaves striate, rigid.
9. U. Hutch-insiae, Schimp. Tufts greenish brown; plants
erect, brittle when dry : leaves close, imbricate, rigid when dry,
erect, slightly open when moist, ohlong-lanceolate, acute from
the ovate base ; borders reflexed : calyptra very hairy : capsule
on a more or less long pedicel, gradually narrowed to a long