BARNES NORTH AMERICAN MOSSES. 273 



below female, small, gemmiform. Bot. Gaz. 14: 94. 1889. Sandy ground: 

 Florida. 



103. Ditrichum 1 inontanmn Leiberg. Plants cespitulose, fastigiately 

 branching, above more or less dichotomous: stem leaves erect or slightly 

 curved, channeled and subulate above with a narrow lamina of two to three 

 rows of cells, subserrulate, margin inflexed, apex coarsely toothed; costa 

 broad, strong, vanishing below apex; leaf cells above and in middle hyaline 

 or chlorophyllose, thick walled, quadrate rectangular below: plants monoi- 

 cous, seldom synoicous: outer perichaetial leaves similar, inner broadly 

 sheathing: seta pale yellow, slightly twisted when dry; capsule narrowed 

 at mouth, erect, ellipitical; when dry laterally compressed and longitudi- 

 nally wrinkled; teeth cleft to base, legs equal, semiterete, minutely papil- 

 lose, obscurely and distantly articulate, attached to a short basilar mem- 

 brane; annulus double, narrow, dehiscent; lid long, conical. Bull. Torr. 

 Bot. Club 20: 112. 1893. On the broken soil, upturned tree roots, etc 

 in mountain regions, at all elevations up to 8,000 feet, Idaho. 



104. Ditrichum ainbiguum Best. Dioicous: tufts loosely cespitose, 

 stem rather stout, arcuate-erect with one or more innovations: leaves pale 

 yellow, shining, crispate when dry, accrescent upwards, lanceolate-subu- 

 late, patent-subsecund, flexuose; lower erect at half clasping short base, 

 lanceolate; upper with oblong erect bases, long lanceolate subulate, con- 

 cave, the slightly thickened involute margins sinuate dentate; cells linear, 

 oblong, indistinct above; walls thick, tortuous, striate: costa percurrent 

 and dentate on back: perichaetial leaves with longer sheathing bases not 

 abruptly narrowed: seta long flexuous; capsule cylindrical, narrow, straight 

 or slightly curved; lid conical-rostrate, blunt, nearly or quite erect, about 

 y s length of capsule; teeth reddish, long, straight, papillose, nearly or 

 quite split to broad basal membrane; legs filiform except at slightly flat- 

 tened connate bases, equal and regular: annulus large, adherent. Bull. 

 Torr. Bot. Club 20: 117. 1893. Moist banks: Mason co., Washington. 



105. Ditrichum flexicaule brevifolinm Kindb. Leaves very small, 

 from an ovate oblong base, contracted to a short point; costa not excur- 

 rent: barren. Mac. Cat. 46. On rocks: National Park; Rocky mountains. 



106. Disticliiuin Macounii C. M. & Kindb. Tufts dusky green, very 

 dense, compact, radiculose below: stems 2-3 cm. high: leaves patent or 

 subfalcate from a short, suddenly narrowed, sheathing base, entire or with 

 a few small teeth at apex; cells short subquadrate; costa sub-percurrent: 

 barren. Mac. Cat. 40. On banks subject to inundation: Columbia river, 

 B. C. 



107. Seligeria campylopoda Kindb. Agrees with S. recurvata in 

 shape of capsule and arcuate pedicel: differs in leaves broader, very much 

 shorter, sub-linear obtuse, rarely short acuminate and subacute; costa not 



iLeptotrichum of L. & J. Man. 105. 



