IFroill the IJULLKTIN OF THE 'r<)KREV BoTANICAL CUB, 34: 569-574. I907I 



Mosses from tropical America 



Robert Statham Williams 



COLOMBIAN MOSSES COLLECTED BY H. PITTIER 



Sphagnum medium pukpurascens (Russ.) Warnst. 



Paramo de Buena Vista, 3000-3600 meters, January, 1906 



DicKANELLA Perrottetii (Mont.) Mitt. 



Cordoba, Dagua Valley, 30-100 meters, December, 1905 



DiCRANUM FRIGIDUM C. M. 



Paramo de Moras, between Mozoco and Pitayo, 3000-3500 

 meters, Februar)% 1906 (ijSy). 

 DiCRANUM speciosum Hook. f. & Wils. 



Paramo de Buena Vista, 3000-3600 meters, January, 1906 

 {1206). 



Campvlopus concolor (Hook.) Mitt. 



Around Huila, Rio Paez Valley, 1600-1900 meters, January, 

 1906 {l2Jl). 



Campylopus {Pseiidocampylopiis) Pittieri sp. nov. 



Inflorescence not determined : plants in dense, rather light- 

 green tufts about I cm. high, with short, appressed branches and 

 leaves densely imbricated and erect when dry ; stem-leaves up to 

 5 mm. long, tubulose above, gradually narrowed to the denticulate 

 apex formed by the excurrent nerve ; costa 4 mm. wide at base,, 

 occupying about five-sevenths of the width of leaf-base, in cross- 

 section showing a single row of large cells on upper surface and 

 below about two rows of small, scarcely thicker-walled cells ; cells 

 of leaf-blade below, narrowly linear, pale, thin-walled, in about 6 

 rows, above becoming short and slightly obliquely elongated ; 

 perichaetial leaves up to 7 mm. long, convolute below, rather 

 gradually narrowed to a slightly rough, subulute point longer than 

 the sheathing part; seta smooth, 14 mm. long, sinuous above 

 when dry, strongly curved when moist ; capsule without stomata, 

 oval, 2 mm. long without lid, dark-red just below mouth, deeply 



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