BARNES — NORTH AMERICAN MOSSES. 353 



519. Pia^iotheciuin pseudo-latebricola Kindb. — Tufts dense, radicu- 

 lose, glossy green: stem irregularly branching; branches often curved, per- 

 fectly complanate, branchlets longer with smaller and narrower leaves: 

 stem leaves small, distichous, not decurrent, shortly ovate lanceolate, sud- 

 denly tapering to a somewhat long filiform and straight point, entire; cells 

 narrow, alar small few and sub-quadrate often wanting; costa obsolete; 

 perichsetial leaves sinuolate above: capsule obovate-oblong, oblique and 

 faintly curved, often pendent; teeth pale; inner membrane clavate, cilia 

 long, sub -appendiculate; lid conical: dioicous. Mac. Cat. 211. — On rotten 

 wood: Columbia River, B. C. 



520. Plagiotheciuin bifarielliiiuKindb. — Plants small, sparingly radic- 

 ulose, loosely cespitose, dark or blackish green, not glossy: stems rigid, 

 pinnate: leaves loose, small, spreading, smooth and not striate; stem leaves 

 at base broadly ovate-cordate, decurrent, serrulate all around, abruptly at- 

 tenuate to filiform hooked-deflexed and sub-entire acumen; cells narrow, 

 linear, basal oblong; costa obsolete or reaching to middle: dioicous. Bull. 

 Torr. Bot. Club 17: 279. — Wet places in woods: Vancouver Island. 



521. Pla^iothecium atteuiiatirameum Kindb. — Tufts green, faintly 

 shining, loose, with few rhizoids: primary stem very short; branches 

 elongate, long attenuate, finally flagelliform: leaves sub-distichous, lower 

 broadly ovate, obtuse or obtusate, entire, long decurrent, concave, recurved 

 at borders from base to above middle at least at one side; cells chlorophyl- 

 lose, somewhat dilated, lowest very mvich wider and shorter and nearly 

 uniform; costa generally short and double, rarely simple and reaching to 

 middle; other leaves gradually smaller, narrower and more acute or acu- 

 minate: barren. Mac. Cat. 277. — On rocks: Quebec. 



5'22. Aml)Iysteg-ii!m fenestratum Kindb. — Plants loosely coherent, 

 green: stems capillary, irregularly ramulose: leaves small, spreading, very 

 narrow, ovate lanceolate, acute, denticulate; cells dilated but elongate; 

 costa more or less distinct: barren. Habit of A. Sprucei. Mac. Cat. 217. — 

 On borders of a pond near London, Ont. 



523. Amblystegiuui speirophy Hum Kindb. — Plants loosely cespitose, 

 dark green: stem capillary, irregularly ramulose, not or sparingly radicu- 

 lose: leaves small, long-distant, spreading, sub-cordate or oval oblong, 

 blunt or sub-acute, entire'or denticulate; cells short; costa sub-percurrent, 

 broad, sometimes very distinct: barren: probably dioicous. Mac. Cat. 

 217.— On rocks: Canaan's Fork, N. B. 



524. Aniblystegiani serpens xantliodictyon Kindb. — Tufts loose, yel- 

 low-brown: stem pinnate: leaves from an ovate-oblong base acuminate, 

 denticulate or entire; alar and often also lower basal cells quadrate, yel- 

 lowish, others oblong except inner, sublinear near costa and in acumen; 

 perich^tial leaves very small, nerveless. Mac. Cat. 218. — On stones: St. 

 Mary's river, Canada. 



