(679.) P. atrovirens, Dicks.; Lesq.& James, Mosses of N. America, 319; Canadian Musci, No. 437.

Cape Chudleigh, Hudson Strait. (R. Bell.) On rocks at Niagara Falls and Lake Superior; on damp rocks three miles below Hector, Rocky Mountains; on damp rocks, Roger's Pass, Selkirk Mountains; on rocks, mountains north of Griffin Lake, B.C., alt. 6,700 feet; also on rocks at Yale, B.C. (Macoun.) On rocks, Lake Huron. (Mrs. Roy.) Greenland. (Fl. Gr.)

Var. atricha, Kindb. (n. var.)

Differs principally in the tufts being very dense and soft-fuscescent with green tips, stem very lax, nearly without paraphyllia and rhizoids.

On rocks along the Eagle River, just below the bridge at Griffin Lake, B.C. August 13th, 1889. (Macoun.)

(680.) P. oligoclada, Kindb. Bull. Torr. Bot. Club, XVII, 277.

Allied to Pseudoleskea atrovirens, but very different in smaller leaf-cells. Tufts loose, dark brown, sparingly radiculose. Secondary stems sparingly branched; branchlets distant, short and julaceous, paraphyllia numerous. Leaves crowded, not decurrent, appressed when dry, falcate when moist, reflexed on the borders generally to the middle, abruptly attenuate from the short ovate base to the longer, sub-entire acumen, not striate; cells very small, faintly papillose, not confluent, short with incrassate walls, rotundate or quadrate, only the upper-most narrow; costa brown, stout, vanishing into the acumen; perichetial leaves longer, acuminate, scarcely reflexed on the borders; cells narrower; archegonia 10-12, paraphyses few, shorter. Dioecious. Capsules and male plants unknown.

On damp rocks, Mount Benson, Nanaimo, Vancouver Island, June 8th, 1887. (Macoun.)

M. Cardot believes that this plant is a variety of Pseudoleskea atrovirens.

(681.) P. sciuroides, Kindb. Bull. Torr. Bot. Club, XVII, 276.

Macounia sciuroides, Kindb. enumer. bryin. exot., 1888.

Plants loosely cohering. Stems sparingly branching, more or less radicant; paraphyllia numerous; branches pale-green, curved above.

Leaves crowded, sub-entire, not, or indistinctly, papillose, notdecurrent, from the ovate base narrowed into a shorter, subulate or piliform acumen, falcate also in a dry state, more or less plicate, revolute nearly all around, margins broader below; cells hyaline, only the lowest basal yellow, all thin-walled, the inner and upper oblong or lanceolate, the other subquadrate; costa stout, finally yellowish, vanishing in or below the acumen. Perichetial leaves from the base more attenuate, denticulate at the acumen, nerveless or indistinctly costate. Capsule oblong, sub-erect or inclined, not striate; peristome orange-colored; teeth densely articulate without distinct longitudinal lines, subulate, hyaline-bordered, when dry incurved; segments scarcely shorter or narrower, in the middle pertuse; basilar membrane very short; cilia smooth; pedicel 1.5 cm. long; spores large, 0.02 mm. Lid and calyptra unknown. Dioecious.

On rocks in the valley of Elk River, Rocky Mountains, 1883. (Dawson.)

Var. denudata, Kindb. (n. var.); Canadian Musci, No. 564.

Stems more rigid, about 10 cm. long, nearly simple, curved only at apex, naked below and not radicant. Barren.

This variety differs very much in its habit; it is possible, that the capsule, not hitherto found, also is different so as to form a new species.

On rocks along the Asulcan Creels near the glacier of that name, Selkirk Mountains, B.C., alt. 6,000 feet, August 7th, 1890. (Macoun.)

(682.) P. stenophylla, Ken. & Card. Coult. Bot. Gaz.; Canadian Musci, No. 580.

Quite common on stems of alder and on stones on damp mountain slopes in Roger's Pass, Selkirk Mountains, August 5th, 1890. (Macoun.)

(683.) P. radicosa, Mitt.; Lesq. & James, Mosses of N. America, 320.

Hypnum tenax, Drumn. Musc. Bor. - Am., No. 225, in part. Banks of Portage River, Rocky Mountains. (Drummond.)

(684.) P. rigescens, Lindb. Act. Soc. Fenn. X. 247.

P. radicusa, var. gracilis, Lesq. & James, Mosses of N. America, 320. Hypnum tenax, Drumm. Musc. Bor. - Am., No. 225, in part.

Banks of Portage River, Rocky Mountains. (Drummond.)

(685.) P. falcicuspis, C. M. & Kindb. (n. sp.); Canadian Musci, No. 510.

Plants densely tufted. Stems much branching. Leaves very papillose, denticulate above, short, ovate-lanceolate, attenuate to an acute or filiform, often curved, point, long-decurrent; margins recurved to or above the middle, not in the upper part; cells rotundate, at the angles quadrate; costa vanishing far below the acumen. Dioecious.

Differs from Pseudoleskea atrovirens principally in the long-decurrent, very distinctly papillose and more denticulate leaves.

On rocks, west side of Lake Mara, Sicamous, B.C., July 3rd, 1889; on rocks at the Illicillewaet Canon, near Revelstoke, also at Quesnel, B.C. (Macoun.)

(686.) P. malacoclada, C. M. & Kindb. (n. sp.)

P. catenvlata, Canadian Musci, No. 460.

Plants densely tufted. Stems not rigid, much branching, sparingly radicant without paraphyllia; branches green or finally fuscescent. Leaves crowded, entire, not decurrent, not distinctly papillose; the stem-leaves from a concave, broadly ovate or rotundate base suddenly narrowed to the subulate or filiform, recurved acumen; branch-leaves more attenuate to the subulate and patent point; basal margins recurved; cells rotundate, the alar quadrate; costa very short and double or none. Perichetial leaves closely connivent with a patent or curved acumen; cells sublinear-lanceolate. Dioecious.

This species resembles Leskea nervosa in habit, but is very different in its nerveless leaves; it is rather allied to the European Pseudoleskea catenulata, but is more robust.

On dry rocks in the ravine west of Murray's Ranche, Spence's Bridge, B.C., May 25th, 1889. (Macoun.)