BARNES NORTH AMERICAN MOSSES. 259 



bordered, cucullate, margins more or less involute; hyaline cells abund- 

 antly fibril lose, pores few on inner surface, on outer surface more numer- 

 ous especially towards apex. Hedwigia 30: 161. 1891. New Jersey; Flor- 

 ida; Mississippi; Louisiana. 



26. Andreaea parvifolia Mull. Dioicous: small, slender, filiform, spar- 

 ingly dichotomous: stem leaves erect-imbricate or slightly secund, minute, 

 when moist from an erect deeply ventricose oval base extended into a 

 spreading oblong more or less roundish-obtuse and recurved more deeply 

 ventricose lamina; ecostate; cells angular, thick walled, fuscous, strongly 

 hyaline-papillose; perichaetial leaves convolute into a very narrow-short 

 cylinder, larger, broader, rather broadly oblong from a narrow base, ligu- 

 late-acuminate, somewhat obtuse, strongly papillose: capsule short pedi- 

 cellate, minute. Flora 70: 219. 1887. Alaska. 



27. Andresea papillosa Lindb. Plants elongate (1-2 in. high) rather 

 stout, branched, slightly tufted, dark brown to black: leaves crowded, 

 spreading in all directions, somewhat shining, ovate with short narrow 

 acute point, cells large (3 times as large as in A. petrophila^ while leaves 

 are as short as in that species), coarsely papillose. Hartman, Skand. 

 Flora 122. 1871. 



28. Andresea alpestris Sch. Monoicous: leaves much smaller than in 

 A. petrophila, crowded, spreading from the sheathing base when moist, 

 ovate, oblique, obtuse, margin hyaline, faintly papillose on the back, ecos- 

 tate; perichaetial leaves with long papillae, cells smaller than in A. petro- 

 phila, round-hexagonal to oval in upper part of leaf, basal cells elongated 

 rectangular, pits few or absent. Limpr. Laubm. 1: 142. On damp rocks: 

 Nova Scotia, near Halifax; Greenland. 



29. Andreaea obovata Thed. Densely pulvinate-cespitose, tufts black- 

 ish above, fuscous below: plants tall, robust, much branched, branches 

 fastigiate: leaves densely crowded, spreading from the imbricate base, apex 

 inclined upward, when dry closely imbricate; from ovate-panduriform 

 gradually lanceolate, rather obtuse; minutely papillose or almost smooth; 

 shining, margin very entire; blackish, under a lens golden yellow; cells 

 very thick walled, rhombic above, sinuate-elongate below, the cell cavities 

 really roundish above, rectangular-hexagonal below: male fls. numerous, 

 on special slender branches; autheridia large, paraphyses long: perichaetial 

 leaves surpassing the upper cauline leaves, convolute, the outer broadly 

 ovate-lanceolate, internal broadly elongate; apex obtuse, not rarely hyaline 

 or premorse. Schimper Syn. Muse. Eur. 814. 1876. Disco Is., Greenland. 



30. Andresea Huntii Limpr. Monoicous: tufts dark, somewhat glossy: 

 leaves strongly falcate-secund, short, broadly ovate, strongly concave base 

 gradually narrowing into a long subulate point; base of lamina made up 



1 A. petrophila has cells 10-14-17// in diameter sec. Limpricht, Die Laubmoose 1: 140. 



