360 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



branch leaves more loosely disposed, sometimes ovate-oblong and narrow 

 areolate; inner perichaetial leaves narrower, longer filiform pointed, 

 nerveless: capsule small, sub-oblong, straight or curved; lid elongate- conic, 

 oblique-apiculate, or rostellate; pedicel very rough, purple: monoicous. 

 Mac. Cat. 231. On rocks and on ground: Newfoundland; New Brunswick. 

 568. Hypnum pseudo-fastigiatum C. M. & Kindb. Allied to H. 

 reptile, but alar leaf cells more numerous, chlorophyllose and dusky, not 

 decelerate; perichsetial leaves nerveless: capsule scarcely constricted below 

 mouth. Mac. Cat. 235. On bases of vines in woods, British Columbia. 

 On rocks, Ontario. 



564. Hypnum fastigiatnm Brid. Stems delicate, creeping, radiculose, 

 much divided, erect in middle of tufts, spreading around outside, short arc- 

 uate at summit; paraphyllia quite numerous, lanceolate or digitate: tufts 

 very large, depressed, yellowish green near surface, brownish within: leaves 

 falciform-secund, stem leaves oval-lanceolate, branch leaves a little nar- 

 rower, gradually narrowed into a long, sharp point, entire or superficially 

 denticulate, plain on borders or slightly revolute, hyaline at base; costa 

 bifurcate, narrow and very short; quadrate cells of basal angles quite 

 numerous, middle ones linear, attenuate; inner perichaetial leaves half 

 sheathing, acuminate, plicate, faintly bicostate: monoicous or dioicous: 

 capsule erect or oblique, oblong-cylindric, arcuate, contracted below 

 mouth; lid convex, apiculate, sometimes short rostrate; annulus narrow. 

 Husnot, Muse. Gall. 400. On dry rocks: Rocky Mountains; Greenland. 



565. Hypnum Waghornei Kindb. Differs from H. fertile in large 

 and hyaline alar leaf cells, other basal ones not yellow: capsule tumid at 

 base, slightly curved: paraphyllia very broad. Mac. Cat. 234. New- 

 foundland. 



566. Hypnum revolutum Mitt. Stems 2-8 cm., ascending-erect, irreg- 

 ularly branched when tufts are compact, depressed and pinnate when loose; 

 yellowish green, ferruginous within: leaves falciform-secund, oval or 

 oblong-lanceolate, long acuminate, denticulate at summit, plicate when 

 dry, strongly revolute from base to apex; costa none or double and short; 

 cells of basal angles roundish quadrate or rectangular, rather numerous, 

 forming small auricles, median cells linear, relatively short (1: 6-8); peri- 

 chsetial leaves strongly plicate: capsule sub-horizontal, rather large, oblong, 

 arcuate, strongly contracted below mouth. Husnot, Muscol. Gall. 402. 

 1894. Morley and Hector, Rocky Mts.; Greenland. 



567. Hypnum revolutum Tillardi Ren. & Card. Leaves short acumin- 

 ate, not or scarcely plicate, alar cells numerous, large. H. Heufleri Vil- 

 lardi R. & C., Bot. Centralbl. 44: 423. 1890. Montana. 



568. Hypnum Canadense Kindb. Intermediate between H. imponens 

 and H. sub-imponens : dioicous: densely cespitose, yellow or pale green: 



