[CONES MUSCORIM. 45 



DESMATODON ARENACEUS, Sulliv. fy Lesq.v. 



Tab. 29. 



Plants hurailes, gregariae vel in caespites cxtensos densos 

 congestaa, quam maxime fructiferae. 



Caulis 4-10-linearis, simplex vel innovando-ramosus, den- 

 sius foliosus, basi radiculis longis copiose instructus. 



Folia inferiora incumbentia, ovato-oblonga ; comalia multo 

 majora, e medio patula, ligulato-oblonga, obtusa, breviter apicu- 

 lata, canaliculata, margine superiore papilloso-crenulato revo- 

 luta ; cellulis inferioribus oblongis laxis hyalinis, superioribus 

 minutis subquadratis valde chlorophyllosis, utraque pagina 

 versus apicem papillosis ; costa valida tereti cum vel sub apice 

 desinente. 



Flores monoici : masculi in ramis (interdum delapsis plantas 

 proprias sistentibus) terminales. 



Capsula elongato-cylindracea, erecta, recta vel curvula, late 

 annulata ; peristomii dentibus sedecem e membrana lata ortis 

 albidis punctulatis remote articulatis discretis vel e basi fere 

 ad medium cohasrentibus, dehinc liberis, inaequaliter bicruribus ; 

 operculo brevi elongato-conico obtuso ; calyptra dimidiata lon- 

 girostra. 



Desmatodon arenaceus, Sulliv. et Lesqx. Muse. Bor.-Amer. Exsicc. (ed. 



1), No. 93; Sulliv. Mosses U. States, p. 28. 

 Desmatodon Ohioensis, Schimp. Synop. Muse. Europ. in adnot. p. 159. 



Hab. Sandstone rocks, Central Ohio. 



This species resembles very closely D. Jlavicans, Bryol. Europ., 

 except in its peristome, which is quite short and fragile, consist- 

 ing of sixteen straight white granular teeth, cohering from their 



