394 Williams: Mosses from west coast of South America 



section showing 2 large guide cells, a rather small stereid band 

 between them and the row of large cells next the upper surface, and 

 below the guide cells a much larger stereid band with outer cells 

 somewhat enlarged; cells in lower part of leaf pale, smooth, 

 mostly short-rectangular, about 8 /x wide by 12 /x long, in upper 

 part densely papillose, rather distinct, nearly square, about 6 X 

 6 ix; perichaetial leaves scarcely differentiated ; seta often somewhat 

 bent and twisted when dry, erect when moist, about 2.5 mm. long; 

 capsule oblong, slightly wrinkled when dry, about i mm. long, 

 including the short, oblique beak; spores rough, about 16 ^ in 

 diameter; calyptra cucullate, smooth, descending about half way 

 down the capsule. 



Chile: vicinity of La Serena, October, iq2qo. 



Gyroweisia boliviana R. S. Williams, Bull. N. Y. Bot. Gard. 3: 

 104. 1903. 

 Peru: Cuzco, September, 19057. 



Leptodontium gracile C. M. 



Peru: vicinity of Lima, July, i8s94- 



Barbula fuscinervia Mitt. 



Peru: Juliaca, September, 19092. 



Barbula fusco-viridis Broth. 



Chile : Palos Quemnados, October, 19184; La Ligua, October, 



19532- 



Barbula replicata Tayl. 



Peru: near Oroya, July, iSyiy; Arequipa, July, I953i>' 

 Posco, July, 18813; Cuzco, August, 19035. 



Pterogoneurum Roseae sp. nov. 



Autoicous, the male flower terminal, the outer perigonial 

 leaves not differentiated, the inner with a very small, pale-golden, 

 roundish, scarcely costate blade bearing a rough, hyaline hair- 

 point 3 or 4 times as long, enclosing 5 or 6 antheridia about 50 n 

 long and numerous, somewhat club-shaped paraphyses twice as 

 long as the antheridia: plants appearing somewhat gregarious, only 

 2-3 mm. high, with very short stems and crowded, bud-like 

 branches; stem leaves when dry, erect, appressed-imbricate, when 

 moist, widely spreading, broadly ovate, serrulate nearly to the 

 base, the blade about i mm. long with a rough, hyaline hair-point 

 often exceeding the blade in length, the margins of the upper half of 

 the blade broadly inflexed over the costa; costa expanded in the 

 upper half, in cross-section showing a broad stereid band below 



