(278.) R. patens, Heuben.; Lesq. & James, Mosses of N. America, 147; Canadian Musci, No. 96.

Trichostomum patens, Drumm. Musc. Bor. - Am., No. 131. Grimmia patens, Mitt. Journ. Linn. Soc. VIII. 20.

Upon rocks near the "Height of Land," Rocky Mountains. (Drum-mond.) On rocks at the mouth of Illicillewaet Canon near Revelstoke; along Pass Creek at Sproat; wet rocks, Lake Mara, Sicamous, B.C.; summit of Mount Benson near Nanaimo, Vancouver Island. (Macoun.) Between Fort Colville and the Rocky Mountains. (Lyall.) Greenland. (Fl. Gr.)

(279.) R. aciculare, Brid.; Lesq. & James, Mosses of N. America, 148; Canadian Musci, No. 97.

Trichostomum aciculare, Drumm. Musc. Bor. - Am., No. 133. Grimmia acicularis, Mitt. Journ. Linn. Soc. VIII, 20.

On stones in rivulets, to the westward of the "Height of Land," Rocky Mountains. (Drummond.) Halifax Co., N.S. (McKay.) On stones in small brooks around Halifax and Truro, N.S.; in a brook north of Lake Superior; on rocks in the Columbia River above Revelstoke, in Eagle River at Griffin Lake, on rocks Lake Mara, Sicamous; common in the Fraser River at Yale; wet rocks at Agassiz and Burrard Inlet at Hastings, B.C. (Macoun.) On stones, New Harbor, Chance Cove and Green Harbor, Newfoundland. (Rev. A. Waghorne.) British Columbia. (Lyall, Douglas.) Sitka. (Roth. Alask.) Miquelon Island. (Delàmare.)

(280.) R. Nevii, C. Muell.; Lesq. & James, Mosses of N. America, 148; Canadian Musci, No. 485.

On rocks at Hot Springs, Kootanie Lake; abundant on rocks at Revelstoke close to the big eddy west side of the Columbia River; on rocks in the bed of the Fraser River at Yale, and at Lake Mara, Sicamous, B.C.; on stones in a brook at Truro, N.S. (Macoun.)

(281.) R. protensum, Braun, (Mss.) Hueben, Musc. Germ. 211. (1833.)

On rocks near Oak Bay, Victoria, Vancouver Island, 1875. (Macoun.) Greenland. (Fl. Gr.)

(282.) R. Macounii, Kindb., Bull. Torr. Bot, Club, XVI, 93; Canadian Musci, No. 418.

Plants fastigiately branching; innovations without lateral fasciculate branchlets. Tufts loosely caespitose, naked at the base, brown, with green tips. Leaves loose, crispate when dry, patent or squarrose when moist, ovate-lanceolate, acute, muticous, smooth and entire, at one side slightly reflexed or erect, on the other always erect; upper cells quadrate and obscure, scarcely or not erose, lower linear and sinuose, marginal uniseriate, quadrate-rectangular and hyaline, basal yellow; costa brown and percurrent. Capsule oblong, dark-brown, not striate; teeth orange, pertuse or cleft to below the middle, smooth; pedicel 0.5 cm. long, straight or sub-erect and contorquate.

In large masses on huge boulders between Cathedral Mountain and Mount Stephen near Field, Rocky Mountains; also on rocks near the Glacier Hotel, Selkirk Mountains; on the summit of the Gold Range, north of Griffin Lake, B.C., alt. 7,000 feet. (Macoun.)

(283.) R. alternuatum, CM. & Kindb.; Canadian Musci, No. 524.

Allied to R. Macounii. Stem lower, 3-4 cm. high, more branched above. Tufts loose, not naked at the base, brown with green tips. Leaves not crisped, when moist suberect or subpatent, nearly straight, ovate-lanceolate, acuminate-acute, often furnished with a short dentate hair point, smooth, reflexed at the base at least on one side; all cells erose, the lower linear, the upper short, angular; costa greenish, stout, percurrent. Perigonial leaves subovate or short-acuminate, acute or subobtuse. Female plants not found.

On boulders at the base of Avalanche Mountain, Roger's Pass, Selkirk Mountains, B.C., Aug. 5th, 1890. (Macoun.)

(284.) R. robustifolium, Kindb., Bull.Torr. Bot. Club, XVII., 272. JR. obscurum, Kindb.; Canadian Musci, No. 419.

Differs from B. Macounii in the leaves being less crispate, (very variable in color, sometimes dark green) peliucid, very squarrose when moist, more reflexed on the borders, often furnished with a short hair-point. Capsule oval, striate or plicate when dry; teeth dark purple-brown, deeper cleft, papillose; the beak of the lid oblique, needle-shaped, very much shorter than the capsule; pedicel slightly curved.

Both these species differ from R. varium and R. Oreganum in the short pedicel and longer leaves. On rocks in a brook, Gold Range, north of Griffin Lake, B.C., alt. 7,000 feet; Mount Arrowsmith, Vancouver Island, alt. 5,700 feet. July 17th, 1887. (Macoun.)

(285.) R. Sudeticum, Bruch & Schimp.; Lesq. & James, Mosses-of N. America, 149; Canadian Musci, No. 98, in part.

Trichostomum Sudeticum., Drumm. Musc Bor. - Am. No. 129.

On rocks near the "Height of Land," Rocky Mountains. (Drum-mond.) On earth among rocks at Truro, N.S.; on rocks at the Asulcan Glacier and Roger's Pass, Selkirk Mountains. (Macoun.) On rocks, Mount Queest, Gold Range, B.C., alt. 6,000 feet. (J. M. Macoun.) On rocks at New Harbor and Chance Cove, Newfoundland. (Rev. A. Waghorne.) Greenland. (Fl. Gr.)

(286.) R. heterostichum, Brid.; Lesq. & James, Mosses of N. America, 149; Canadian Musci, No. 99.

On rocks at the base of Avalanche Mountain, Roger's Pass, Selkirk Mountains; dry rocks at Revelstoke, on the Columbia River; Deer Park, Lower Arrow Lake, and along Pass Creek at Sproat; on rocks at Sicamous, at Yale and Spence's Bridge, also at Hastings, B.C.; very common on rocks around Victoria, and on Mount Arrowsmith, Vancouver Island. (Macoun.) Greenland. (Fl. Gr.)

*

(287.) R. obtusum, (Smith) Lindb.; Braithw. British Moss-Flora, Vol. IT., 40.

R. Sudeticum, Canadian Musci, No. 98, in part.

Dioecious; short, densely pulvinate. Leaves quite hairless, ovate-oblong, gradually acuminate, obtuse at the point, nerve lost far below the apex, margin narrowly revolute. Capsule oblong, narrowed at the mouth, lid acicular, peristome fugacious, irregular, teeth with 2 unequal legs.

On rocks near Otter Head, Lake Superior, July 28th, 1869. (Macoun.)

(288.) R. affine, (Schleich.) Lindb.; Braithw. British Moss-Flora, Vol. II., 41; Canadian Musci, No. 499.