OF THE rOBTYOaXTH PABALEEL OE LATITUDE. 2o 



Amongst the American Orihotricha there occur several species 

 ■which appear to have been overlooked, or to have been passed 

 over as states of European species, but which on comparison do 

 not appear to be identical with any previously known ; of these 

 are — 



O. parvulum. Monoicuin, humilliuumi, foliis patentibus elliptico- 

 lauceolatis sensim acutis acutatis acuniinatisque nervo carinatis, mar- 

 ginibus vix recurvis, cellulis basi ad angulos alares paucis oblongis 

 fuscis, caeteris omnibus rotundatis, perichsetialibus basi latioribus, 

 theca immersa obovata plicata, peristomio dentibus 16, calyptra pli- 

 cata ramentosa. — 0. Sturmil, Sullivaut. 

 Hab. Prope Santa Fe Xeo-Mexicanorum, Wright, et in Novae Angliae 



alpibus, Oakes. 

 Very different from O. Stimuli, Hsch. et Hoppe, and in its 

 foliage more like O. tenellum, Bruch. 



O. plsillum. Monoicurn, brevissimum, foliis patentibus ovato- 

 lanceolatis, inferioribus acutis, superioribus late acutatis obtusiusculis 

 nervo carinatis, marginibus reflexis, cellulis basi quadratis pellucidis, 

 superioribus rotundatis granulosis, perichsetialibus interioribus brevi- 

 oribus, theca immersa obovata siccitate 8-plicata leptoderma, peri- 

 stomio dentibus 16 brevibus. 



Hab. Pennsylvania, Drummoad. 



Less than 0. tenelhim, and with a very thin, short, pale capsule, 

 and foliage more rigid than in 0. parvulum, 



O. Coulteri, sp. nov. Monoicurn, habitu staturaque 0. tenelli, foliis 

 densis e basi erectiore subovali angustatis lanceolatis patentibus, api- 

 cibus latiusculis obtusiusculis subacutis, marginibus recurvis, nervo 

 sub apice evanido carinatis, cellulis basi in folii medio paucis oblongis 

 elongatisque latioribus, inde ad apicem abbreviatis quadratis rotun- 

 disque distinctis papillosis, perichsetialibus erectioribus latioribus ellip- 

 tico-lanceolatis acutioribus, vaginula ramentis elongatis pilosa, theca 

 einersa ovali-cylindracea octies plicata in pedunculo sensim angustato, 

 peristomio dentibus ciliisque tertia parte brevioribus angustis 8, ca- 

 lyptra ramentis brevibus appressis obtecta. 

 Hab. California, Coulter. 



"Very similar in appearance to 0. tenellum, Bruch, but its cap- 

 sules exserted beyond the apices of the perichaetial leaves, which 

 are more acute, its calyptra more pilose, its cilia short, and its 

 male flowers larger. 



The description of O. cylindrocarpum, Lesq., in which the 

 peristome is stated to be " dentibus externis pallidis, ciliolis robustis 

 longioribus albidis articulatis," and the calyptra " valde pilosa," 

 indicates another nearly allied Californian species. 



