352 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



513. Plagiotheeium denticulatum squarrosum Kindb. Distinctly 

 squarrose when dry. Bull. Torr. Bot. Club 17: 279. British Columbia; 

 Behring Sea. 



514. Plagiotheciuin membranosum Kindb. Tufts dense, green, glossy: 

 leaves distichous, crowded, patent, flat, ovate-oblong, acute or short acu- 

 minate, estriate, entire, or denticulate above middle, decurrent; cells very 

 long and narrow, alar large, hyaline and sub-quadrate; costa none or obso- 

 lete: capsule cylindrical-obovate, horizontally curved; teeth yellow; pedicel 

 smooth; lid unknown: probably dioicous. Mac. Cat. 215. On dead wood: 

 Ottawa and Belleville, Ont. 



515. Plagiothecium brevipungens Kindb. Tufts dense, dark green : 

 stems prostrate, irregularly pinnate; branches attenuate: leaves crowded, 

 scarcely decurrent; ovate-oblong, acute or short pointed, auricled, not plicate 

 or reflexed on borders, entire or slightly denticulate at apex; upper cells long 

 and narrow, alar very distinct quadrate inflated and hyaline; costa very 

 short, thick and simple, or none: capsule curved, lid short, conical; pedicel 

 smooth: monoicous. Mac. Cat. 215 On stones: Ottawa, Ont. 



5 16. Plagiotkecium aciculari-punafens C. M. & Kindb. Dioicous: tufts 

 dense, radiculose, depressed, glossy green: stem irregularly divided; 

 branches few and short, not attenuate: leaves concave, open erect or patent, 

 decurrent, entire, ovate-oblong with a short needle-shaped recurved or 

 patent point; margins narrowly recurved below middle at one side; areo- 

 lation uniform and dilated; angular cells large and not numerous, sub-rect- 

 angular; costa none or indistinct: capsules not found. Mac. Cat. 216. 

 On earth: New Brunswick. 



517. Plagiothecium decursivifolium Kindb. Intermediate between P. 

 latebricola and P. pseudo-latebricola : agrees with the last in branches 

 complanate, leaves distichous, capsule oblique: differs in leaves broader, 

 short-pointed, decurrent, alar cells not distinct but decurrent ones rectan- 

 gular. Capsule arcuate when dry, and finally furrowed; lid longer, often 

 curved. Mac. Cat. 277. On cedar stumps in a swamp: Belleville, Ont. 



518. Plagiothecinm Silesiacum Sch. Plants more robust than P. 

 striatellum: stems inclined, radicant, often fasiculately branched 

 branches arcuate, procumbent: tufts lax, drepressed, pale or yellowish 

 green, shining: branch leaves erect-spreading, more or less secund, oval- 

 lanceolate or lanceolate, gradually long acuminate, not decurrent, dentate 

 in upper half; costa double, short, very faint; cells of the basal angles rec- 

 tangular or oblong, middle linear; inner perichsetial leaves sheathing, ter- 

 minated by a long, dentate, recurved acumen: monoicous: capsule oblique 

 or horizontal, cylindric, smooth, collum distinct, slightly contracted below 

 mouth; lid conic; annulus simple; teeth pale, inner membrane half height 

 of teeth. Husnot, Muse. Gall. 354. Newfoundland; New Brunswick. 



