687. H. dimorphum, Br. Eur.
688. H. Macounii, Best, Bull. Torr. Bot. Club, Vol. XXVIII., p. 127. H. heteroptemm, Can. Cat. Pt. VI., p. 182.
Plants small, in dense, spreading tufts, yellowish green to golden brown. Stems without central strand, stoloniform, 3 to 5 cm. long, irregularly branched; stems and branches curved at the tips; larger branches (secondary stems) pinnate or bipinnate, often subfasciculate, ascending-erect; paraphyllia few, ovate or linear-lanceolate, serrate; stem-leaves close, appressed when dry, erect-spreading when moist, subsecund, narrowly costate to the middle, .3 to .4 mm. wide, .5 to .7 mm. long; from a cordate, subclasping base, ovate, gradually to abruptly acuminate, spreading, tips recurved, margins plane, papillate-serrulate; larger branch-leaves ovate-lanceolate, long-acuminate, serrate, more or less secund; cells of the basal-central area Of stem-leaves sub-linear, .005 to .007 mm. wide, 3 to 5 times long, gradually passing into the quadrate cells of the basal angles and margins and becoming roundish quadrate to rhombic-oblong above, each cell with usually two small papillae on both surfaces near the ends of its long diameter; apical cells of smaller branch-leaves quadrate, crowned with two papillae. Dioecious; perichetial bracts whitish, inner long, acuminate, flexuous-spreading, serrate; pedicels smooth, shining, flexuous, about 1.5 cm. long; capsules oblong, gradually tapering to a short neck, horizontal, pachydermous, reddish brown,lightly constricted under the mouth and subpendant when deoperculate; urn .8 mm. wide, 1.5 to 2 mm. long; exothe-cial cells elliptical-oblong; exostomial teeth yellowish brown, strongly lamellate, confluent into a reddish basal band; endosto-mial band nearly one half the length of the teeth; segments somewhat open, as long as the teeth; cilia 1 to 2, nodose-appen-diculate; annulus broad, of two rows of cells, deciduous; operculum conic, obliquely rostellate; spores .009 to .012; matures in spring.
Type specimen collected on damp rocks above the railway bridge at Goldstream, 10 miles from Victoria, Vancouver Island, June 2nd, 1893. This was named P. Vancouveriense by Kindberg. On May 18th, 1887, the same species was collected in the same place and named P. heteropterum, Bruch. Fine specimens were collected on Protection Island and Mount Benson, near Nanaimo, July, 1893; also on Mount Arrowsmith, Vancouver Island, July
19th, 1887. (Macoun) Chilliwack Valley, B.C., 1901. (J.M. Macoun)
690. H. procurrens, (Mitt.) Ran. & Hervey.
H. aberrans, Ren. & Card.; Can. Cat. Pt. VI., 183.
Specimens from Roger's Pass and Revelstoke are correctly named. (Macoun.) On rocks at Skagway and Canon City, Alaska. (Macoun.)
689. H. heteropterioides, Best; Bull. Torr. Bot. Club, Vol. XXVIII., 128. H. heteroptetum, Can. Cat. Pt. VI., p. 182 in part.
Plants quite small, in intricate spreading tufts, dark green. Stems, without central strand, 3-6 cm. long, variously divided and irregularly branched; larger branches (secondary stems) ascending-erect, pinnate to bipinnate; branchlets fasciculate, often tufted; leaves of primary stems erect-spreading, lower sometimes recurved at tips, papillose, .25-.35 mm. wide, .4-.5 mm. long; from a cordate, subdecurrent base, triangular to ovate-lanceolate, finely pointed, margins plane, papillose-denticulate, costa thin, usually short, rarely narrow and longer, reaching the middle; leaves of secondary stems appressed when dry, erect-spreading when moist, cordate-triangular, acute to acuminate, margins papillose-serrulate; ultimate branch-leaves ovate, acute to narrowly acuminate, cells of the basal-central area of the stem leaves, not so clearly differentiated as in the preceding species, oblong to sublinear about 006 mm. wide, 2-4 times as long, those of the basal margins quadrate, passing into oval-oblong above, each cell with 2-5 small bead-like, irregularly distributed papillae on both surfaces; apical cells of ultimate branch-leaves quadrate to oblong, crowned with 2-4 papillae. Dioecious: perichetial bracts whitish, flexuose-spreading, inner long and narrowly acuminate, margins denticulate, pedicels smooth, flexuose-curved, about 1.5 cm. long; capsule oval, horizontal, short-necked, pachydermous, contracted under the mouth when deoperculate; urn 1.5 mm. long, .7 mm. wide; exothecial cells thick-walled, oval to oblong; annulus broad, of 2-3 rows of large cells, deciduous; exostomial teeth yellowish, strongly lamellate, confluent at the base; endostomial band about one-half the length of the teeth; segments slightly open; cilia 1-2, nodose; operculum conic-rostrate, straight or oblique, nearly as long as capsule; spores smooth, .0IC-.0I2 mm.; matures in summer; grows on rocks and stones in damp places. Type locality, Washington; on rocks, Forward Inlet, Gulf of Georgia, B.C., 1885. (Dr. G. M. Dawson.) On rocks at Hastings,. B.C., April 6th, 1889. (Macoun.)
Var. filescens, Best. Bull. Torr. Bot. Club, Vol. XXVIII.
129. H. heteropterum, Can. Cat. Pt. VI. 182 in part.
In widely spreading tufts, dark green passing into yellowish green. Stems prostrate, 8-10 cm. long, or longer, sparingly branched; stems and branches filiform; leaves smaller; papillae as in type; sterile.
On rocks at Hastings, B.C., April 13th, 1889; on rocks Nan-aimo River, Vancouver Island, April 27th, 1887; also on rocks at Goldstream, near Victoria, Vancouver Island, June 2nd, 1893. (Macoun.)
On rocks in a ravine at Goldstream, Vancouver Island, June 2nd, 1893; along Nanaimo River, Vancouver Island, April 27th, 1887; on rocks, Mount Finlayson, near Victoria, Vancouver Island, May 31st, 1887; on rocks by the Colquitz River, near Victoria, Vancouver Island, June 1st, 1893. (Macoun.) A part of the above specimens were named H. Vancouveriense by Kindberg and all of them Hypnum occidentalis, Sulliv., by Dr. Best in the paper cited on the preceding pages. We have followed Dr. Best in the disposition of our specimens of the genera Leskea, Pseudoleskea, Heterocla-dium, Thuidium and Claopodium.