328 Williams: Peruvian mosses 



cells of the stem-leaves much smaller, with thinner, scarcely 

 sinuous walls and the inner perichaetial leaves have much longer, 

 narrower cells throughout the lower leaf. 

 Rhacomitrium crispipilum (Tayl.) Jacq. 



Lucumayo Valley, 3,000 m., June, 1915, Cook & Gilbert 1264. 



Funaria calvescens Schwaegr. 



Ollantaytambo, about 3,000 m., on wet soil. May, Cook & 

 Gilbert 669; Manchu Picchu, about 2,100 m.. May, Cook &' Gil- 

 bert 996. 

 Mielichhoferia andixa Sull. 



Araranca, south side of La Roya Pass, about 4,100 m., on 

 earth wall, April, 1915, Cook & Gilbert 182a. 



Mielichhoferia bogotensis Hampe. 



Ollantaytambo, about 3,000 m.. May, 1915, Cook & Gilbert 705. 



Leptobryum Wilsoni (Mitt.) Broth. 



Arequipa, on wet rock, 2,300 m., June, 1911, Foote 9. 



Anomobryum filifor:me (Dicks.) Husn. 



Santa Rosa, on dry hillside, 3,960 m., July, 1911, Foote 10. 



Bryum andicola Hook. 



Above San Miguel, on rocks, 1,830 m., September, 191 1, 

 Foote II. 



Bryum argenteum L. 



Cuzco, on dry rock, 3,500 m., 191 1, Foote 12; Ollantaytambo, 

 on soil, about 3,000 m., May, 1915, Cook & Gilbert 610. 



Bryum biforme sp. nov. 



Pseudoautoicous, the male plants minute, 1-2 mm. high, 

 attached by radicles to the tomentum of the fertile stems, each 

 plant bearing one or two flowers containing two or three antheridia, 

 with few, somewhat longer paraphyses; the outer antheridial 

 leaves broadly ovate-lanceolate, scarcely serrulate, with costa 

 vanishing well below the apex: fertile plants with more or less 

 branching, tomentose stems 3-4 cm. high, the short branches 

 often bearing at the apex abundant, filiform flagella, 3-4 mm. 

 long and covered with minute scale-like leaves; stem-leaves widely 

 spreading when moist, somewhat spreading-flexuous and twisted 

 when dry, serrulate above, rather broadly ovate, acute, slightly 

 decurrent, 3-3.5 mm. long, the margins flat above, recurved below 

 with a border of elongate, narrow, pale cells most distinct half 



