. A revision of the North American Isotheciaceae and Brachythecia [microform]. Mosses; Mousses. *i i .: 150 nate, entire, slightly concave, ecostate, or costa very faint, short and double; leaf-cells linear-rhomboidal; median cells 8 : l ; quadrate alar cells few; stem leaves broader, more abruptly acuminate: antheridia oblong ; perigonial leaves broadly ovate-lanceolate, en- tire, acute to acuminate : perichaetium 2 mm. long; the leaves loosely sheathing, squarrose at apex; inner oblong-lanceolate, more or less long-acuminate, more or less serrate at apex, ecos- tate ; cells linear above, rho
. A revision of the North American Isotheciaceae and Brachythecia [microform]. Mosses; Mousses. *i i .: 150 nate, entire, slightly concave, ecostate, or costa very faint, short and double; leaf-cells linear-rhomboidal; median cells 8 : l ; quadrate alar cells few; stem leaves broader, more abruptly acuminate: antheridia oblong ; perigonial leaves broadly ovate-lanceolate, en- tire, acute to acuminate : perichaetium 2 mm. long; the leaves loosely sheathing, squarrose at apex; inner oblong-lanceolate, more or less long-acuminate, more or less serrate at apex, ecos- tate ; cells linear above, rhomboidal and hyaline below. Sporophyte 1—2 cm. high ; seta red-brown ; capsule lighter red-brown, oblong- cylindric, mm. long, : i, often stomatose at base; oper- culum conic to conic-apiculate ; annul us very narrow and easily detached, of one row of cells ; teeth of peristome linear-lanceolate, closely and regularly articulate, sub-moniliform and slightly granular above; segments as long as teeth, linear-lanceolate, strongly carinate, more or less split when old, granular-roughened; spores brownish yellow, minutely roughened, 14/i, maturing in autumn and winter. ' ' ' Type locality European. On stems and roots of trees. Not common. Canada and northwestern United States (Macoun); Kakabcka Falls, Ont. (Mrs. Britton); Saskatchewan and Rocky Mountains (Bourgeau); .Santa Fe (Fendler); White Mountains (James); Mon- tana (R. S. Williams); Pike's Peak, Colo. (S. L. Clarke); Minne- sota (F. F. Wood); Mt. Desert (Rand, Flora Mt. Desert, 212). Apparently widely distributed in Canada and along the northern border' of the United States in mountainous regions, but rather in- frequent and local. Illustr.\tions.—Dill. Hist. Muse. pi. 42. f. 62 {Hypmtm sericaim ramosius et tenuis); Hedw. St. Cr. 4: //. 2. {Leskea poly- anthd) Br. & Sch. 1. c; Husnot. Muse. 8g; Rab. Krypt. Fl. A^' ExsiccATi.—Drumm. Muse. Am. 222; Aust. Muse. Appal. Suppl. I, 537; Macoun, Can.
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