Williams: Peruvian mosses 329 



way down the leaf where it becomes four or five cells wide; costa 

 not quite percurrent, from a broad, reddish brown base, tapering 

 gradually to the slender apex; cells in upper leaf rhomboidal or 

 hexagonal, in lower leaf larger and more or less rectangular, all 

 with somewhat thickened walls distinctly pitted, at least in the 

 lower leaf; the median cells about i6/x wide and 40-50// long; 

 outer perichaetial leaves about the length of the stem-leaves, 

 from a broad base, oblong, acute, serrulate and with costa van- 

 ishing a little below the apex; seta about 2 cm. long; capsule 

 pendent with sporangium rather narrowly ovate and tapering 

 into a neck about one half the length of the sporangium, the median 

 exothecal cells irregularly elongate with evenly thickened, mostly 

 slightly curving walls, the stomata abundant in the neck, about 

 40^1 long; annulus large; peristome-teeth lanceolate, about loo/x 

 wide at the base and 600 n high, with hyaline borders and the 

 outer plates finely punctate, mostly one and one half to two 

 times wider than high, the inner lamellae without cross-walls; 

 inner segments about the height of the teeth, keeled and solid 

 along the median line, very slender-pointed with mostly two long, 

 slender cilia between them, sometimes distinctly appendiculate; 

 spores rough, up to 20 ^i in diameter; lid highly convex-apiculate. 

 (Plate 20.) 



Torontoy, Urubamba Valley, about 3,600 m.. May, 1915, 

 Hiram Bingham yjo. 



This is, I believe, the only Bryiim known having inflorescence 

 as above described; the flagella also are unusual. 



Bryum densifolium Brid. 



Urubamba, on damp earth, 2,900 m., July, 191 1, Foote 13; 

 Santa Anna, 912 m., August, 191 1, Foote 14. 



Mnium ligulatum C. Miill. 



Lucma, on dead wood, 2,130 m., Aug. 191 1, Foote 75, growing 

 mixed with Cyclodictyon aeniginosum (Mitt.) Broth, and Tricho- 

 stomum brachydontiiim Bruch.; Urubamba, on wet earth, 2,900 m., 

 July, 191 1, Foote 16. 

 Anacolia subsessilis (Tayl.) Broth. 



Urubamba, on loose earth and rocks, 2,900 m., July, 191 1, 

 Foote 77; Ollantaytambo, about 3,000 m.. Cook & Gilbert, May, 

 1915, 504, 749,771a. 



Breutelia bryocarpa Herzog. 



Lucumayo Valley, 1,800-3,600 m., June, 1915, Cook &• Gilbert, 

 1320a. 



