(645.) A. rostratus, Schimp.; Lesq, & James, Mosses of N. America, 305; Canadian Musci, No. 254.

Hypnum rostratum, Drumm. Musc. Bor. - Am. No. 228.

About Beaver Lake, Upper Canada, etc. (Drummond.) Pictou Co., N.S. (McKay.) Fredericton, N.B. (Fowler's Cat.) On rocks, Canaan Forks, Queen's Co., and Tay, York Co., N.B. (J. Moser.) On rocks along the Gaspé coast, Que.; very common on the bases of trees in swamps and on rocks throughout Ontario. Ottawa, Belleville, Leamington and Amherstburg, Detroit River; on rocks, Mount Benson, Vancouver Island. (Macoun.) On the bases of trees, Nixon's Pond, near London, Ont. (J. Dearness.)

(646.) A. attenuatus, Hueben.; Losq. & James, Mosses of N. America, 305; Canadian Musci, No. 255.

Hypnum attenuatum, Drumm. Musc Bor. - Am., No. 226.

About the roots of trees in Upper Canada (Ontario.) (Drummond.) Common; Pictou Co., N.S. (McKay.) On roots of trees, Truro, N.S.; also Fredericton, N.B. (Fowler's Cat.) Bases of old trees and stumps, Canaan Forks, N.B. (J. Moser.) Bases of trees, Tobique River, N.B. (Hay.) On the bases of trees, Whycocogmah, Cape Breton; on old logs and the bases of trees in swamps, common in Quebec and Ontario; Ste. Anne des Monts River, Gaspé, Que.; Ottawa, Belleville, Lake Nipissing, Lake Nepigon, Wooler, Leamington and Owen Sound, Ont.; on the bases of trees at Sicamous, B.C., 1889. (Macoun.) Roots of trees, River Rouge, Argenteuil, Co., Que. (D'Urban.) On the bases of trees at London, Ont. (J. Dearness.)

(647.) A. obtusifolius, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 305; Canadian Musci, No. 256.

A, viticulosum, Drumm. Musc. Bor. - Am., No. 163.

Tay, York Co., N.B. (J. Moser.) Abundant on the bases of trees in damp woods at Ottawa and westward through Ontario to Belleville, Wooler and Owen Sound. (Macoun.) Trunks of trees, River Rouge, Argenteuil Co., Que. (D' Urban.) On Ostrya in woods at London, Ont. (J. Dearness.) Trunks of trees in Upper Canada (Ontario) and about Niagara Falls. (Drummond.)

(648.) A. apiculatus, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 306; Canadian Musci, No. 257.

On decayed logs, but chiefly on limestone rocks in woods at Ottawa; on rocks at Shannonville, Hastings Co.; on old logs, Kennebec, Adding-ton Co,; and on limestone rocks, Owen Sound, Ont. (Macoun.)

(649.) A. viticulosus, Hook. & Tayl.; Lesq. & James, Mosses of N. America, 306; Canadian Musci, No. 258.

Shaded rocks; Niagara Falls, sterile. (Lesq. & James.) Owen Sound, Ont.; fertile. (Mrs. Boy.) Common on limestone ledges west and north of Hull, Que.; also in McKay's woods at Ottawa; very abundant on limestone ledges all around Owen Sound, Ont. (Macoun.)

(650.) A. heteroideus, Kindb. (n. sp.)

Leskea nigrescens, Kindb. Bull. Torr. Bot. Club, XVI., 97; Canadian Musci, No. 395 and No. 252, in part.

L. nervosa var. flagellifera, Kindb. Ott. Nat. Vol. IV. 62.

Plants densely tufted, green, finally fuscescent or blackish. Stem creeping, subpinnate, much branching and furnished with numerous small, flagelliform branchlets, densely beset with very small, oblong, obtuse and nerveless leaves; paraphyllia broad. Stem-leavessubdistant, decurrent, appressed when dry, open-erect when moist, from a broadly ovate base suddenly narrowed to a long, subulate or sublinear acumen, entire, faintly papillose; margins revolute at the base; branch-leaves more attenuate; cells round-oval, the marginal of the base quadrate; costa vanishing below the acumen. Dioecious. Fruiting specimens not found. This species resembles Leskea nervosa in habit.

On flat limestone rocks and on the roots of trees in McKay's woods, Ottawa; also on flat limestone rocks in maple woods at Owen Sound, Ont.; on rocks, "Dry Canon," discharge of Devil's Lake, Rocky Mountains. (Macoun.)