Hypnum (Brachythecium) Iaetum, Brid.; Lesq. & James, Mosses of N
New Harbor, Newfoundland, and at Battle Harbor, Labrador. (Rev. A. Waghorne.) Bass River, N.B. (Fowler's Cat.) On stones in woods, Canaan Forks, Queen's Co., N.B. (J. Moser.) Pictou Co., N.S. (McKay.) Baie St. Paul, Charlevoix Co., Que. (St. Cyr.) Stones in woods, Gunn River, Anticosti; on stones in woods at Truro, N.S.; old logs, Gaspé Co., Que.; on stones in woods around Ottawa; on stones in woods at Belleville, Trenton, Wooler, Owen Sound and London, Ont. (Macoun.) In woods, London, Ont. (J. Dearness.) In marshy ground; rare. (Drummond.)
Obs. Brachythecium laetum, only found in America, has also a monoecious inflorescence (not "dioecious," Lesq. & James); the Euro pean Brachythecium luteolum, C. Mueller, is indeed dioecious.
(715.) B. digastrum, C. M. & Kindb. (n. sp.)
Tufts laxly cohering, olive-green, not shining. Stem rigid, sub-pinnate or irregularly branching, radiculose below; branches sub-julaceous, obtusate. Stem-leaves when dry loosely appressed or subimbricate, crowded, patent or subsecund when moist, decurrent, not auricled, plicate, bi-ventrose, ovate and short-acuminate with the acumen flexuous or when dry serpentino-corrugate, borders more or less recurved but not reflexed, subentire or faintly denticulate above; lower basal cells wide and sub-rhombic, the alar rather quadrate-rectangular and not very distinct, the upper conflate, small, very chlorophyllose, the inner median sublinear, the other oblong-lanceolate; costa thick and subflexuous, long and vanishing near the acumen. Branch-leaves ovate-oblong, more distinctly revolute at the borders, denticulate at the acumen and narrower areolate. Female flowers small, inner perichetial leaves filiform-acuminate with the acumen arcuate, long-costate and denticulate. Capsule asymmetric, sub-cylindric, curved; lid long-conic; pedicel smooth, 1-2 cm. long. Peristomial teeth conic-connivent when moist, dark red-brown below, very much longer than those in the middle open segments; cilia nodulose, not appendiculate, annulus none. Monoecious. Habit of Leucodon julaceous.
The species is (fide C.Mueller) allied to Brachythecium (Cavernularia) biventrosum, CM., but more robust. It agrees also with B. Iaetum, (Brid.) not found in Eurofe; it has long-acuminate, soft and shining, and when dry, patent leaves. The European B. luteolum, C. M., (B. Iaetum, Schimp., non Brid.) is also different from the true B. Iaetum, which is neither completely nor correctly described by Lesq. & James, principally in the dioecious inflorescence.
On rocks in McKay's bush, Ottawa, Ont., October 12th, 1889. (Macoun.) On rocks, Canaan Forks, Queen's Co., N.B., 1889. (J. Moser.)
(716.) B. spurio-acuminatum, C. M.&Kindb. (n. sp.); Canadian Musci, No. 566.
Differs from Brachythecium acuminatum in the tufts being lax, loosely adhering at the substrate, the leaves denticulate and recurved at the borders nearly all around, the alar cells still more numerous and very chlorophyllose, the perichetial leaves subulate-acuminate, not filiform-pointed, the inflorescence monoecious.
On logs in woods, Brighton, Northumberland Co., Ont., October 6th, 1888; also on logs at Leamington, Lake Erie, Ont. 1890. (Macoun.)
(717.) B. acuminatum, (Beauv.)
Hypnum (Brachythecium) acuminatum, Beauv.; Lesq. & James, Mosses of
N. America, 336; Canadian Musci, No. 282. H. pulchrum, Drumm. Musc. Bor. - Am., No. 180, in part. H. erectum, Drumm. Musc. Bor. - Am., No. 224.
Pictou Co., N.S. (McKay.) Bases of trees, Canaan Forks, Queen's Co., N.B. (J. Moser.) On earth in McKay's woods, Ottawa; at Carleton Place, 30 miles west of Ottawa; on leaning trees at Wooler; on earth and logs in woods at Belleville, Ont.; on the bases of trees, Moose Mountain, Assiniboia. (Macoun.) In woods, London, Ont. (J. Dearness.) Upon trunks of trees in Upper Canada (No. 180) (Ontario); roots of trees in Upper Canada (No. 224.) (Drummond.)
* B. cyrtophyllum, Kindb. (n. subsp.)
Brachythecium cyrtophyllum, Kindb. Ott. Nat. IV., 63.
Habit of a small form of B. albicans. Plants caespitose, green and faintly glossy. Stems irregularly divided, not creeping; branchlets filiform, sub-obtuse. Leaves small, close, loosely appressed when dry, open-erect when moistened, ovate-acute or short-acuminate, notsulcate or decurrent, serrulate at least above the middle; areolation loose; upper cells narrowly rhomboidal, inner sublinear; alar quadrate, somewhat numerous, chlorophyllose; costa stout, reaching to 2/3 Peri-gonial leaves ecostate. Dioecious.
On elm logs in thick woods, Brighton, Northumberland Co., Ont., October 6th, 1888. (Macoun.)
Var. setosum, Sulliv. & Lesq.
In holes in maple trees many feet above the ground at Belleville, Ont. (Macoun.)
Hypnum (Brachythecium) salebrosum, Hoffm.; Lesq. & James, Mosses of N. America, 336; Canadian Musci, No. 283; Drumm. Musc, Bor. - Am., No. 175.
Pictou Co., N.S. (McKay.) Norman's Cove and New Harbor, Newfoundland. (Rev. A. Waghorne.) Bass River and Fredericton, N.B. (Fowler's Cat.) On earth, Tobique River and St. John, N.B. (Say.) On earth at Canaan Forks, Queen's Co., N.B. (J. Moser.) Baie St. Paul, Charlevoix Co., Que. (St. Gyr.) Moist ground, Ste. Anne des Monts River, Graspé Co., Que.; on stones in woods at Ottawa; on logs in woods at Belleville, Brighton, Wooler and Lake Superior, Ont.; on logs, Green Lake, N.W.T.; decayed trunks, Moose Mountain, Assini-boia; on logs along Peace River, lat. 56°; on stones at Morley, Hector and Banff, Rocky Mountains; on logs at Agassiz, B.C.; and on earth at Victoria, Vancouver Island. (Macoun.) Common in cedar swamps at London, Ont. (J. Dearness.) Saskatchewan. (Bourgeau.) Pend d'Oreille River, B.C. (Lyall.) In marshy ground; rare. (Drum-mond.) Kotzebue Sound. (Both. Alask.) Cape Vancouver, Alaska, 1891. (J. M. Macoun.) Greenland. (Fl. Gr.)