Differs from H. reptile; leaves larger, long-acuminate; those of the stem ovate-oblong, denticulate above, those of the branches ovate-lanceolate, denticulate all around; alar cells large hyaline. Capsule pale yellow; segments yellow; lid not seen; pedicel longer.
On the bases of trees in woods, Brighton, Northumberland Co., Ont., Oct. 13th, 1893. (Macoun)
1183. H. perichaetiale, Br. Eur.; Kindb., Bryol, N. Am. & Eur.,
Leaves subovate,acute or sometimes short-acuminate; alarsmall, dusky, on a narrow triangular space, the others lanceolate-oblong. Capsule finally brown; pedicel short.
On boulders in woods at Ottawa, Ont., Sept., 1891. (Macoun.)
869. H. reptile, Michx.
On rocks at Dawson, Yukon. Leaves not decurrent. (Williams)
870. H. pallescens, Schimp.
Stony Lake, Peterboro Co., Ont., July, 1892. (Thos. Walker) Credit Forks, Ont., 1892. (Jas. White)
871. H. fertile, Sendt.
Very common in woods on rocks, earth and logs at Baddeck, Margaree and Half-Way Brook, Cape Breton Island, N.S., 1898; on old logs at Woodstock, N.B., July, 1899; common at Cassel-man, near Ottawa, Ont., June, 1892; also on old logs, Cache Lake, Algonquin Park, Ont., June, 1900. (Macoun)
872. H. Waghornei, Kindb.
H. Canariense, Mitt.; Kindb., Bryol. N. Am. & Eur. 148.
On damp rocks, Woodstock, N.B., June 3rd, 1899; on old logs in woods at Baddeck, Cape Breton Island, N.S., July, 1898. (Macoun.)
873. H. fastigiatum, Brid.
Near Halifax, N.S., June 19th, 1883; on trees in woods at Owen Sound, Ont., Sept. 12th, 1890. (Macoun) Fort Chimo, Ungava Bay, Labrador, August, 1891. (A. P. Low.)
874. H. hamulosum, Bruch & Schimp.
Port Etches, Alaska, Lat. 60° 30', June 18th, 1892. (J. M. Macoun) At the bases of trees in damp places, at Dawson, Yukon. (Williams.)
1184. H. implexum, Ren. & Card., Bot. Gaz., Vol. XXII., 52.
Tufts depressed, light green. Stems intricate, pinnately ramu-lose, branchlets hooked, fastigiate above. Leaves falcate-secund, from a broadly ovate-deltoid base rather suddenly constricted into a narrow subulate acumen, plane on the margins, quite entire or subdenticulate at the base of the acumen; costa double, short; cells narrowly linear, those of the angles few but distinct, small, quadrate, greenish or pellucid. Fruit and flowers unknown.
Allied to H. hamulosum, Schimp., but more robust and distinct by the light-green tint; the leaves broader at base and more suddenly constricted into a subulate acumen and the alar cells more numerous and more conspicuous, much resembling the small green form of H. cupressiforme, Linn., but in this the leaves are narrower and the alar cells much more numerous and con" spicuous.
Seal Island, Labrador, 1893. (Waghorne.)
1185. H. subeugyrium, Ren. & Card., Bot. Gaz.,Vol. XXII., 52.
Monoecious, resembling H. eugyrium, Sch., var. MacKayi, Sch., from which it differs by the alar cells of the leaves small, quadrate, not forming excavate auricles and the capsule exannulate. From the forms of H.palustre, Linn., having the leaves subimbricate, it is distinguishable by the minutely denticulate apex of the leaves and by the costa always double and shorter.
Bay of Exploits, Newfoundland, 1893. (Waghorne.) On rocks in a brook at Woodstock, N.B., July 3rd, 1899; on wet rocks, Petawawa River, Algonquin Park, Ont., July 24th, 1900. (Macoun.)
1186. H. orbicularicordatum, Ren. & Card., Bot. Gaz., Vol. XXII., p. 52.
Tufts very soft, pale lurid green above, discoloured whitish yellow and brownish-variegated below. Stems slender, erect 4-9 cm. high, simple or sparingly branching, not radiculose, cuspidate at apex. Leaves soft, erecto-patent or very loosely imbricate, subundulate when dry, decurrent at base, broadly cor-date-suborbicular, very obtuse, quite entire, slightly sulcate; costa thin, vanishing far from the apex; areolation loose, pellucid; cells soft, thin-walled, rhomboidal-hexagonal in the middle, the marginal narrower, the upper shorter, the alar very loose, large soft and empty. Flowers and fruit unknown.
Depot Island, northwest shore of Hudson Bay, Lat, 63o 59', W. Long. 90o 20' 1893. (George Comar.)
Easily distinguished from the allied H. cordifolium, Hedw., by the nearly simple sterns, the very soft leaves, and the broader and looser areolations.
876. H. circinale, Hook.
Common in the Chilliwack Valley, B.C. (J. M. Macoun.) At Salmon and Sheep creeks, near Juneau, Alaska. (Miss G. Cooley.) In good fruit March 28th, 1898, Canon City, Dyea Creek; also common on fallen logs at Skagway, Alaska. (Williams.)
877. H. Sequoieti, C. Muell.
Chilliwack Valley, B.C., 1901. (J. M. Macoun)
1187. H, subplicatile, (Lindb.) Limpr.
On damp earth and rock, Lake Lindeman, Yukon. This plant is very closely related to callichroum but differs in being rather smaller with regularly pinnate branches, leaves wider just above the base and abruptly narrowed to the insertion, capsule shorter-(Williams.)
880. H. imponens, Hedw.
On logs in swamps, Edmonton, Ont., 1893. (Jas. White.) On rocks in a ravine, Margaree, Cape Breton Island, N.S., July, 1898; on logs in woods Otter Slide Creek, Algonquin Park Ont., July, 1900; n old logs below Queenston Heights, Ont., 1901. (Macoun.)
881. H. subimponens, Lesq.
At Sheep Creek and at Gold Creek Canon, near Juneau, Alaska. (Miss G. Cooler.)
882. H. revolutum, (Mitt.) Lindb.
On rocks, Moose Mountain, Elbow River, Rocky Mountains, Alta., July, 1897; on birch bark, Algonquin Park, Ont., June 8th, 1900. (Macoun.) Lake Lindeman and Lake Marsh, Yukon. (Williams.)
883. H. plicatile, (Mttt.) Lesq. & James.
On rocks, Jumping Pound Creek, Braggs' Creek, Elbow River, and Crow's Nest Pass. Rocky Mountains, Alta., 1897. (Macoun.)
884. H. cupressiforme, Linn.
On sandy soil, Sable Island, N,S., Aug., 1899; on trunks, Cache Lake, Algonquin Park, Ont., 1900. (Macoun.)