Moist marshy places and banks of rivers amongst the Rocky Mountains. (Drummond.) On earth at Edmonton, N.W.T.; not rare on earth on the Rocky Mountains in the National Park at Banff; Black-water River, and mountains north of Griffin Lake, B.C. (Macoun.) Summit of Mount Queest, Gold Range, B.C. (J. M. Macoun.) Christian-shaab, Greenland. (Fl. Gr.)
(174.) D. Systylius, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 111; Canadian Musci, No. 71, in part.
Moist, marshy places, among the Rocky Mountains. (Drummond.) On earth, Boggy Creek, Manitoba, 1872. (Macoun.) Disco, Greenland. (Fl. Gr.)
(175.) D. Porteri, James; Lesq. & James, Mosses of N.America, 112; Canadian Musci, No. 70.
On rocks along the Gaspé coast, 1882; also at the bases of trees on stones, extremity of Pelee Point, Lake Erie. (Macoun.) Niagara Falls. (G. W. Clinton.)
(176.) D. obtusifolius, Schimp.; Lesq. & James, Mosses of N. America, 114.
Didymodon oblongifolium, (n. sp.) Drumm. Musc. Bor. - Am., No. 114. D. latifolium, Drumm. Musc. Bor. - Am., No. 115.
Mountain-rocks; often on the under side of projecting ledges and moist marshy places, Rocky Mountains. (Drummond.)
(177.) D. subtorquescens, C. M. & Kindb. (n. sp.) D. latifolius, Canadian Musci, No. 69, in part.
Nearly allied to D. atrovirens, Smith, (D. nervosus, Bruch & Schimp. and Lesq. & James), but the tufts are compact, the stem higher, (about
1 cm.), the leaves green, not dingy, very short, suboval or subspathu-late, smaller, less opaque, the costa neither excurrent nor broader above, the capsule cylindric.
The description of D. nervosus by Lesq. & James corresponds nearly to our species, but not to the true European.
On earth on exposed cliffs along the Graspé coast above the Madeline River, 10th August, 1882. (Macoun.)
(178.) D. cernuus, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 114; Canadian Musci, No. 71.
On earth, South West Point, Anticosti; on earth at Campbellton. N.B.; on rocks and cliffs along the Gaspé coast; on earth along the Pembina River, northwest of Edmonton, N.W.T.; Cache Creek Mountain, and on wet rocks in a ravine at Kamloops, B.C. (Macoun.) Greenland. (Fl. Or.)
Var. xanthopus, Kindb. (n. var.)
Leaves less chlorophyllose, costa virescent. Capsule larger; teeth more united; pedicel yellow.
On black earth at the crossing of Boggy Creek on the "Old Trail" leading to Touchwood Hills, Manitoba, 12th August, 1872. (Macoun.)
(179.) D. camptothecius, Kindb. (n. sp.)
Habit of Desmatodon cernuus. Plants densely caespitose. Leaves long, narrow-lingulate, subobtuse, entire or obscurely crenulate, faintly papillose, marginate and at the base revolute, mucronate by the excurrent greenish costa. Capsule cylindric, arcuate: teeth short, cut in
2 or 4 partly coherent segments; annulus indistinct; lid with a short oblique beak; pedicel flexuous, reddish-yellow, 10-12mm.long; spores, large, about 0.04 mm.
Along the Gaspé coast on rocks close to the sea, August 12th, 1882. (Macoun.)
(180.) D. obliquus, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 115.
Tortula suberecta, (n. sp.) Drumm. Musc. Bor. - Am., No. 145.
Shady alpine places, upon the borders of a stream among the Rocky Mountains. (Drummond.) Sabine Island, Greenland. (Fl. Gr.)
(181.) D. Laureri, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 115.
Tortula bryoides, (n. sp.) Drumm. Musc. Bor. - Am., No. 135.
Upon the ground; on the summit of a hill in the Rocky Mountains, (Drummond.) On earth along a ditch near Victoria, Vancouver Island,, 1875. (Macoun.) Shannon Island, Greenland. (Fl. Gr.)
(173.) D. latifolius, Brid.
St. Paul Island, Behring Sea. (Palmer.)
1V3. D. latifolius, Brid.
On Unalaska Island, Behring Sea, Aug., 1891. (J. M.Macoun) On earth at Lake Louise, Rocky Mountains, Alta., Aug., 1891. (Macoun.)
Var. glacialis, Schimp.; Lesq. & James, Mosses of N. America, 111.
Greenland. (Berggren.) 174. D. Systylius, Bruch, & Schimp. St. Paul Island, Behring Sea. (Dr. Merriam.)
175 D. Porteri, James.
On flat limestone rocks, Foster's Flats, Niagara River, May nth, 1901. (Macoun)
178. D. cernuus, Bruch & Schimp.
On earth at Dawson, Yukon, 1899. (Williams.)
998. D. systilioides, Ren. & Card., Botanical Gazette, Vol. XXX., p. 16.
A full description in Latin is given besides the following which is sufficient for our purpose.
By the lid attached to the columella and persistent after the opening of the capsule, this species resembles D. Systilius, Schimp., but is clearly distinct from it by the leaves of a more obscure and more papillose areolation, with a distinct pellucid yellowish border, the nerve stouter, brownish, not or very shortly excurrent, and by the total lack of peristome; at least none of the capsules we have been able to examine show the slightest trace o. this organ. The pellucid border of the leaves shows some relationship between D. systilioides, Ren. & Card., and D. Porteri, James, but the latter has a much narrower capsule, with a highly conic lid not adhering to the columella, and the peristome and annulus are well developed.
L'Anse au Mort, Labrador, 1894. (Waghorne.)