Williams: Peruvian mosses 333 



and extending about three fourths up the leaf or shorter and 

 dividuig into two to five branches; leaf-cells all elongate, prosen- 

 chymatose and mostly slightly sinuous, with rather thin walls, 

 the median 5-6 (x wide and 40-60 11 long, the alar usually forming a 

 distinct cluster of broad, short cells either greenish or finally 

 reddish-brown; fruit not found. (Plate 18, figs. 7-12.) 



A variety evidently of the above, growing in flowing water, 

 has elongate, hispid, wiry stems, 10-15 cm. long, without leaves 

 below and in habit like H. Bestii, except much more slender. 



Cuzco, on wet rock, 3,500 m., July, 1911, Foote j/ (type); 

 Ollantaytambo, about 3,000 m., on rock under spring, May, 1915, 

 Cook & Gilbert 666 (the variety) . 



Ctenidium malacodes Mitt. 



Ollantaytambo, about 3,000 m., on trunks, May, 1915, Cook &■ 

 Gilbert '/62b. 



Mittenothamnium andicola (Hook.) Card. 



Ollantaytambo, about 3,000 m., on trunks, May, 1915, Cook & 

 Gilbert 762 . 



Mittenothamnium oxystegum (Spruce) Card. 



Santa Ana, on rock, 912 m., August, 1911, Foote 38. 



Hypnum Schreberi Willd. 



Ollantaytambo, about 3,000 m., May, 191 5, Cook & Gilbert 

 748a. 



Ectropothecium aeruginosum (C. Miill.) Mitt. 



Santa Ana, 912 m., on dead wood', August, 1911, Foote jg. 

 Palamocladium leskeoides (Hook.) E. G. Britton. 



San Miguel, on rock, 1,830 m., September, 191 1, Foote 40. 

 Brachythecium asperulum (Hampe) Jaeg. 



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

 753a- 

 Brachythecium flaccum C. Miill. 



Huadquinia, on wet earth, 1,530 m., August, 1911, Foote 41; 

 Ollantaytambo, about 3,000 m., on trunks. May, 1915, Cook & 

 Gilbert '/'62c. 



Brachythecium sericeovirens (C. Miill.) Par. 



Ollantaytambo, on rock, 2,750 m., July, 191 1, Foote 42. Known 

 previously only from Patagonia. 



