(660.) H. pseudo-sericeum, Lesq. &, James, Mosses of N. America, 310; Canadian Musci, No. 435.

Abundant on rocks at Yale, B.C. (Macoun.)

(661.) H. corticola, Kindb. Bull. Tort. Bot. Club, XVII., 277.

On rocks at Cedar Hill and Mount Tolmie, near Victoria, Vancouver Island, May 16th, 1887. (Macoun.)

(662.) H. sericeoides, C. M. & Kindb. (n. sp.); Canadian Musci, No. 496.

Nearly allied to Homalothecium sericeum, differing in the more densely crowded, not decurrent, narrower and heteromorphous branch-leaves; some are long-acuminate, subentire, less reflexed at the margins; others are short-acuminate, strongly reflexed at the margins to the serrulate acumen. Capsules and pedicels unknown.

Crevices of granite rocks a little above Revelstoke, B.C., May 7th, 1890. (Macoun.)

(663.) H. sericeum, (Lino.) Bryol. Europ.; Canadian Musci, No. 549.

Hypnum sericeum, Drumm. Musc. Bor. - Am., No. 169.

Stem pinnate, creeping. Branch-leaves narrow, ovate-lanceolate, short-decurrent, long-subulate or filiform-acuminate, plicate, faintly denticulate nearly all around or subentire; margins scarcely reflexed; cells narrow, the alar quadrate; costa long, vanishing in the base of the acumen. Perichetial leaves scarcely plicate, attenuate to a filiform point. Capsule erect, sub-cylindric, straight or slightly curved; teeth pale, segments short, basilar membrane high, to one-third of the segments; cilia none; annulus broad; pedicel rough, 1-2 cm. long. Dioecious.

On the bark of trees at Michosen, 16 miles from Victoria, Vancouver Island, April 16th, 1887; very abundant on rocks at Banff and in the "Dry Canon" at Devil's Lake, Rocky Mountains. (Macoun.) Rocks among the Rocky Mountains. (Drummond.)