Williams: Peruvian mosses 325 



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

 704a. 



Growing with Thuidium peruvianiim. 



Globulina peruviana sp. nov. 



Inflorescence unknown: plants in rather compact mats with 

 simple stems 1-4 mm. high, bearing radicles at the base and 

 imbricate-appressed leaves rather uniformly placed along the 

 stem or somewhat clustered at the apex and forming a globose 

 bud about 0.5 mm. in diameter; stem in cross-section about 200 /x 

 in diameter with cells of outer walls not differentiated and with a 

 distinct central strand; leaves rotundate or slightly oblong, 

 about 0.5 mm. long, more or less cucullate, the flat margins 

 crenulate half way down or more; costa vanishing abruptly a 

 little below the apex, rather weak in the lower part, widest near 

 the apex, slightly rough on the back and papillose on the inner 

 face, in cross-section showing two rows of medium-sized, thick- 

 walled cells on the dorsal side and a single row of much larger cells 

 on the ventral side; cells mostly gradually smaller from the base 

 to the apex of the leaf, more or less shortly rectangular below, 

 12-16 Ai by 16-30 yu, toward the apex square to rhomboidal, 

 with sides 6-8 n long, finely papillose on both sides about the 

 upper half of the costa, the marginal cells smooth; fruit unknown. 

 (Plate 17, figs. 8-15.) 



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

 1 91 5, Cook & Gilbert 177a. 



Growing apparently on dry soil with Pogonatiim polycarpiim, 

 at the highest elevation given for any of the collections. 



Barbula costata Mitt. 



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

 6iob. 



A small amount of what is apparently this species occurred, with 

 immature fruit, growing with Bryiim argenteum. What appears 

 to be this also was found sterile, mixed with Leskea gracillima, 

 at the same locality by these collectors, 663a. 



Barbula pruinosa (Mitt.) Jacq. 



Cuzco, on dry rock, 3,500 m., July, 191 1, Foote 3. 



Barbula replicata Tayl. 



Cuzco, on dry rock, 3,500 m., July, 191 1, Foote 4; Ollantay- 

 tambo, about 3,000 m., on soil. May, 1915, Cook &• Gilbert 6ioa. 



