Differs from A. tectorum in the leaves being more distinctly recurved to the short acumen; middle cells round-oval; costa generally reaching to the acumen. Stem irregularly divided, not creeping. Capsule and lid as in A. tectorum; peristome not seen.
On rock's on the coast of Labrador. (Waghorne.)
On old logs, Golden Lake, Ont., Sept. 27th, 1900. (Macoun.)
662. H. sericeoides, C. M. & Kindb.
On rocks, Moose Mountain, Elbow River, Alta., July 1st, 1897. (Macoun.)
663. H. sericeum, Linn.
On earth by the sea near the Indian Village, Comox, Vancouver Island, June 20th, 1893. (Macoun.)
672. C. dendroides, Web. & Mohr.
Very abundant on old logs in a swamp at Golden Lake, Renfrew Co., Ont. In very fine fruit Sept. 27th, 1900. (Macoun.) Canon City, Dyea Creek, Alaska; Marsh Lake and Klondike River bottom near its mouth. Not fruiting. (Williams.)
Var. Oregonense, Ren. & Card. Shore of Lake Marsh, Yukon, on gravel; sterile. (Williams.)
673. C. Americanum, Brid.
Roundhouse woods, near Niagara Falls, Ont., May 20th, 1901. (Macoun.)
674. C. Ruthenicum, (Weinm.) Lindb.
Port Etches, Alaska, Lat. 60° 30', June 18th, 1892. (J. M. Macoun.)
678. O. chryseum, Bruch & Schimp.
On earth along Bragg's Creek, Elbow River, Rocky Mountains, July 9th, 1897. (Macoun.) Skagway and Lake Bennett. (Williams.)
794. T. neckeroides, Bruch & Schimp.
Porotrichum neckeroides, (Schwaegr.) Willisms.
Canon City, Dyea Creek, Alaska. (Williams.)
866. H. rugosum, Linn.
Fort Chimo, Ungava Bay, Labrador, Aug., 1896. (A. P. Low) On Pike's Portage, Great Slave Lake, May, 1900. (J. W. Tyrrell.) Lake Marsh, and Mile's Canon, sterile specimens abundant, Dawson; fruit not rare. (Williams)
867. H. crista-castrensis, Linn.
Lake Lindeman and Klondike River bottom. Not found in fruit. (Williams.)
1180. H. molluscoides, Kindb., Revue Bryol. 1895.
Leaves nearly entire, distinctly decurrent; alar cells somewhat large, well-defined. Capsule small, cylindric, arcuate. Otherwise like H. mollusacm, Hedw.
On logs, Bay Bull Arm, Newfoundland. (Waghorne.) On old logs, Baddeck, Cape Breton Island,N.S., July 9th, 1898. (Macoun.)
1181. H. Alaskae, Kindb., Bryol. N. Am. & Eur. 142.
Leaves entire, sub-decurrent, gradually acuminate; alar cells large, hyaline well-defined. Capsule subovate or arcuate; pedicel short. Tufts green or pale yellow. Stem creeping subpinnate or plumiform.
On old logs, Newfoundland. (Waghorne.) On trees, Canaan Forks, Queen's Co., N.B., Oct., 1894. (J. Moser.)