342 BULLETIN Of THE UNIVERSITY OF WISCONSIN. 



455. Brachythecium acnminatnm snb-albicans R. & C. Facies of 

 B albicans: more robust, pale yellow: branches silky, julaceous: areola- 

 tion denser, cells narrower. Bot. Gaz. 15:60.1890. Louisiana; Florida. 



456. Brachythecium cyrtophyllum Kindb. Sub-species of B. acumi- 

 natum: habit of a small form of B. albicans: plants cespitose, green, 

 faintly glossy: stems irregularly divided, not creeping; branchlets fili- 

 form, sub-obtuse: leaves small, close, loosely appressed when dry, open-erect 

 when moist, ovate-acute or short- acuminate, not sulcate nor decurrent, 

 serrulate at least above middle; areolation loose, upper cells narrowly 

 rhomboidal, inner sub-linear, alar sub-quadrate somewhat numerous and 

 chlorophyllose; costa stout, reaching to %; perichaetial leaves ecostate: 

 dioicous. Mac. Cat. 191. On elm logs in thick woods: Ontario. 



457. Brachythecinm Roellii Ren. & Card. Dirty or yellowish green: 

 stems soft, depressed, scarcely radiculose, subpinnate; branches elongate, 

 flexuous: leaves ovate-lanceolate, decurrent, quite long and narrowly 

 acuminate, faintly plicate; margin sinuate or denticulate, plane in middle, 

 revolute at base and at acumen; costa reaching beyond middle to % 

 length; cells narrow, elongate, linear, alar cells few sub-quadrate: evidently 

 dioicous. Hedwigia 32: 263. 1893. Vancouver. 



458. Brachythecinm glareosuni Sch. Related to B. salebrosum: 

 stems decumbent, often very long, 15-20 cm., forming large yellow tufts, 

 softer, shining: leaves more erect, longer acuminate; cells narrower, those 

 of angles oblong: dioicous: capsule oblique or sub-horizontal; lid conic, 

 longer. Husnot, Muse. Gall. 324. On earth at roots of trees: Revelstoke, 

 B.C. 



459. Brachythecium albicans occidentale Ren. & Card. Stems de- 

 pressed, laxly foliate: leaves subsecund, less long acuminate, sometimes 

 very distinctly denticulate. Hedwigia 32: 258. 1893. Washington; Mon- 

 tana. 



460. Brachythecium harpidioides C. M. & Kindb. Tufts compact, 

 soft, radiculose below, whitish or bright green, not shining: stems intri- 

 cate, irregularly branching or pinnate: leaves spreading, somewhat loosely 

 disposed, decurrent, more or less arcuate, not auricled, plicate, nearly flat, 

 ovate, subulate acuminate; borders faintly denticulate, recurved often all 

 around; cells distinctly chlorophyllose, alar large sub-quadrate, others 

 lanceolate: dioicous: capsules not found. Mac. Cat. 194. On old logs in 

 woods: Revelstoke, B. C.; New Brunswick. 



461. Bracyhthecium salebrosum Waghornei R. & C. Monoicous: 

 tufts very dense: stems erect, turgid, not radiculose: leaves more crowded, 

 imbricate: lid mamillate. Differs from B. mamilligerum Kindb. in leaves 

 imbricate, not patulous when dry: stems not radiculose. Bot. Gaz. 19:. 

 238. 1894. Battle Harbor, Labrador. 



