324 Williams: Peruvian mosses 



broader part of the leaf narrow and elongate with pitted walls. 

 The collection is scanty and sterile. 



Campylopus leucognodes (C. Miill.) Paris. 



Lucumayo Valley, 3,600 m., June, 191 5, Cook & Gilbert 1264a. 



FissiDENS asplenioides (Sw.) Hedw. 



San Miguel, on rock, 1,820 m., September, 1911, Foote i. 



FiSSIDENS CRISPUS Mont. 



Ollantaytambo, about 3,000 m., May, 1915, Cook &f Gilbert 754. 



FiSSIDENS RIGIDULUS Hook. f. & Wils. 



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



Gilbert 6/0. 



Trichostomum brachydontium Bruch. 



Cuzco, on dry rock, about 3,500 m., July, 1911, Foote 2; 

 these Cuzco specimens have leaves shorter and broader than in 

 typical specimens and possibly should not be referred here, but 

 they seem to be only a stunted form of the species; Lucma, on 

 dead wood, 2130 m., August, 191 1, Foote i^a, 



Trichostomum semivaginatum Schimp. 



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

 501a. 



Leptodontium integrifolium sp. nov. 



Dioecious, the male plants about like the fertile, the flowers 

 with outer leaves similar to those of the stem, the inner broadly 

 oblong, rounded obtuse, scarcely one third the length of the 

 outer, costate, of mostly golden-brown, elongate, smooth cells 

 enclosing five or six antheridia and numerous, longer, filiform 

 paraphyses: fertile plants simple or slightly branched, the stems 

 3-4 cm. long with scattered, loose tufts of radicles and leaves, 

 when dry rather loosely imbricate and incurved-ffexuous, when 

 moist spreading-recurved ; stem-leaves 3-3.5 mm. long, ovate- 

 lanceolate, the entire margins strongly recurved from a little 

 below the apex to near the base and papillose; costa stout, papillose 

 on the back, excurrent into a serrulate point sometimes 0.5 mm. 

 long; cells of the upper part of leaf rather obscure, scarcely elon- 

 gate, 8-9 (X in diameter, densely papillose on both sides, in the 

 lower fourth of leaf, elongate, narrowly rectangular, smooth, 

 except near the margin and costa; perichaetial leaves about 6 mm. 

 long, convolute, with a subulate, abruptly spreading, serrulate 

 point; fruit unknown. (Plate 17, figs. 1-7.) 



