652. P. polyantha, (Schreber) Bruch & Schimp.

On trees at Credit Forks, and Edmonton, Ont., Oct., 1893. (Jas. White.) On old logs, Big Intervale, Margaree, Cape Breton Island, N.S., July, 1898; on old logs, Otter Slide Creek, Algonquin Park, Ont., 1900; also at Golden Lake, Ont., 1900; on the bases of trees in woo is, Elbow River, Rocky Mountains, July, 1897. (Macoun.) Sheep Camp, Dyea Creek, on wood, Alaska; at the bases of trees at Dawson. (Williams.)

Var. rupestris, Best, N. var.

In thin loose mats, deep to dark green; stems prostrate, irregularly branched; stem leaves ovate-lanceolate, narrowly acuminate, subcomplanate, f lcato-secund, spreading-incurved, entire, costa obsolete, .25 to .35 mm. wide, .6 to .9 mm. long; median leaf cells linear-rhomboidal, 4 to 6 times as long as wide: alar cells Dale.

18 1/2 oblong-quadrate, not numerous; pedicels slightly roughened; peristome as in type. With the appearance of a Plagiothecium. On limestone rocks, Ottawa, Canada. (Macoun.)

654. p. pseudo-platygyrium, Kindb.

On the bases of trees at Baddeck, Cape Breton Island, N.S., July, 1898; on old logs at Leamy's Lake, near Hull, Que., Nov.,. 1896. (Macoun.)

1124. P. cyrtophylla, Kindb., Bryol. N. Am. & Eur. p. 60.

Leaves broad-ovate, generally obtusate, obtuse, not or slightly recurved; cells oval, larger than in P. intricata. Branches crowded. Tufts green. Capsules unknown.

On old logs by the Peace River, Atha., above Dunvegan, Oct., 1872. (Macoun.)

1125. P. subdenticulata, Schimp.; Lesq. & James, Mosses of N.

America, 308.

On trees, Newfoundland. (Waghorne.)

655. P. Selwynii, Kindb.

On an old log fence, Blueberry Point, Aylmer, Que., April 17th, 1900. Macoun.)

656. P. Ontariensis, C. M. & Kindb.

On old logs, Port Dover, Ont., Sept. 24th, 1890. This specimen was referred to P. intricata, in Part VI. On trees, Rustico Bay, Prince Edward Island, July 3rd, 1888. This specimen was referred to P. polyantha in Part VI. (Macoun) On trees at Edmonton and Credit Forks, Ont., 1892. (Jas. White.)

Dr. A. J. Grout, in his revision of this genus, places all the above with P. intricata.

657. P. filari-acuminata, C. M. & Kindb.

On trees in woods, Câche Lake, Algonquin Park, Ont., June 9th, 1900. (Macoun.)

658. P. intricata, Bruch & Schimp.

Common on trees at Baddeck and Margaree,Cape Breton Island, N.S., 1898; on old fence rails at Brighton, Ont., 1893; at Golden Lake, Ont., 1900. (Macoun.) Dr. A. J. Grout, in the Bulletin of Torrey Bota ical Club, Vol. XXIII., pages 223-233, publishes-a preliminary Revision of the North American Isotheciaceae. We sent him all our mounted specimens for examination, and the changes made by him on the returned specimens are given below.

Under Pylaisiapolyantha he places P. Ontariensis, as a synonym, while the specimens entered now on another page are placed under P. intricata.

P. pseudo-tlatygyrium and P. fiiari-acuminata, are reduced to one and take the name of Pylaisiella polyantha pseudo-platygy ia. (Kindb.) P. Selwynii, Kindb. becomes a synonym of P. intricata.

P. revolutifolia Kindb. is referred to Entodon repens, (Platygyrium repens. Bruch and Schimp.)

More work is necessary on this genus before our specimens will be satisfactorily arranged.

(652.) P. polyantha, Bruch & Schimp. . White Bay and Harbor Deep, Newfoundland. (Rev. A. Waghorne.)

(652.) P. polyantha, Bruch & Schimp.; Lesq. & James. Mosses of N. America, 308; Canadian Musci. No. 260.

Hypnum polyanthos, Drumm. Musc. Bor. - Am., No. 222.

Trunks of trees, stones and logs in woods. (Drummond.) On trees, Bass River, N.B. (Fowler's Cat.) On trees, Tobique River, N.B. (Hay.) On the bases of trees at Canaan Forks and Tay, N.B. (J. Moser.) On trees. Rustico Bay, Prince Edward Island; also on logs at Campbellton, N.B.; on trees along the Gaspé Coast, Que.; on rotten logs at Ottawa and Belleville, and on trees at Lake Nepigon, Ont.; on stumps and poplar trees in woods at Sydenham Falls, Owen Sound, Ont.; on the bases of aspen poplar trees throughout the prairie region and northward to Peace River; on stumps at Morley and on stones at Banff, Rocky Mountains. (Macoun.) On trees along the Clearwater River. N.W.T. (J. M. Macoun.) Saskatchewan and Rocky Mountains. (Bourgeon.) Near London, Ont. (J. Dearness.)

(653.) P. heteromalla, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 308; Canadian Musci, No. 261.

On trees along Niagara River at the Whirlpool; on trees, abundant at Edmonton and Lesser Slave Lake, also in the Peace River district and at Yale, B.C., 1875. (Macoun.) On trees along the Clearwater River, N.W.T., lat. 57°. (J. M. Macoun.) Trunks of trees and stones in various situations; Rocky Mountains. (Drummond No. 222.)

(654) P. pseudo-platygyrium, Kindb. (n. sp.)

Tufts intricate; stems irregularly divided or subpinnate; branches thick. Leaves crowded, the upper glossy-green, the other finally brown, from the ovate-oblong base long-acuminate with a sub-filiform, often curved, distinctly denticulate acumen; borders recurved to the acumen; cells narrow and confluent, except the quadrate alar ones; costa double, distinct. Perichetial leaves serrulate, abruptly narrowed to the long, hairpoint-like acumen. Capsule straight, suberect, cylindric and wide-mouthed; segments free, longer than the teeth; lid conic, short-apiculate; pedicel 1.5 cm. long. Monoecious.

This species resembles Platygyrium repens (or rather some forms of Hypnum cupressiforme), but it differs in the monoecious inflorescense and the denticulate leaves.

It agrees with Pylaisia Selwynii in the recurved leaf-borders, differs in the narrower leaves and the narrow capsule. It differs also from Pylaisia subdenticulata in the larger and more crowded leaves and larger capsule; from Hypnum reptile in the peristome, the basal cells not being yellow, etc.

On decayed trunks near Nepigon House, Lake Nepigon, July l7th, 1884. (Macoun.)

(655.) P. Selwynii, Kindb., Ott. Nat. II., 156; Canadian Musci, No. 434.

Differs from P. intricata in the denser, darker green tufts, the leaves broader, short-acuminate, reflexed to the acumen at one border or at both, the short alar and marginal cells more numerous, the capsule short-oval, the segments adhering to two-thirds of the teeth,

Very abundant on old cedar fences along the Richmond Road, three miles west of Ottawa, Oct. 12th, 1885. (Macoun.)

(656.) P. Ontariensis, C. M. & Kindb. (n. sp.) P. intricata, Canadian Musci, No. 262, in part.

Agrees with Pylaisia intricata in the leaves being ovate-lanceolate-subulate-acuminate, subentire, with numerous and quadrate alar cells, the oblong-ovate capsule, the segments adhering to and bordering the lower half of the teeth, split above and cohering at the apex; differs in the branchlets being distant, not crowded, the leaves broader, shorter, acuminate with more dilated cells, the lid of the capsule obtuse, not rostellate, peristomial teeth broader, spores smaller.

On earth at the bases of trees, Ste. Anne des Monts River, Gaspé Co., Que., August 24th, 1882; also along Lake Nepigon. 1884. (Macoun.)

(657.) P. filari-acuminata, C. M. &Kindb. (n. sp.)

Agrees with Pylaisia velutina in the leaves being filiform-acuminate, but the acumen is distinctly denticulate, often twisted, the alar cells more numerous, the capsule thicker, oblong, the peristomial teeth nearly free from the segments. Lid not found.

On logs subject to inundation west side of the Columbia River at Revelstoke, B.C., May 3rd, 1890. (Macoun.)

(658.) P. intricata, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 309; Canadian Musci, No. 262, in part.

Pictou Co., N.S. (McKay.) On trees at Fredericton, N.B. (Fowler's Cat.) On bases of trees, Tobique River, N.B. (Hay.) Decaying logs, Ste. Anne des Monts River and Grand Etang, Gaspé Co., Que.; common on trees around Ottawa; on trees at Belleville and Sudbury Junction, Ont.; common on trees at Port Dover, Lake Erie-and Owen Sound, Ont.; on trees, Moose Mountain, Assiniboia; also at Lake Nepigon. (Macoun.) Common at London, Ont. (J. Dearness.)

(659.) P. velutina, Bruch & Schimp.; Lesq. & James, Mosses of N. America, 309; Canadian Musci, No. 470.

Heart's Delight, Newfoundland. (Rev. A. Waghorne.) On trees at Bass River, N.B. (Fowler's Cat.) On earth at the base of a tree, Mount Albert, Gaspé Co., Que.; on old logs, Dow's swamp, Ottawa; on old logs, Port Dover, Lake Erie, Ont.; on trees in the Kaminis-tiquia Valley, Fort William, Lake Superior. (Macoun.)