[CONES MUSCORUM. 63 



PTYCHOMITRIUM INCURVUM, Schwcegr. 



Tab. 39. 



Plants pusillse, laxe casspitosa), rigidulac, saturate virides, 

 a'tate fusco-flavesccntes. 



Caulis 2-3-lincaris, simplex vel parcc innovando-ramosus, 

 conferte foliosus. 



Folia erecta vel incurvulo-erecta, siccitate cirrhato-crispata, 

 lineali-lanceolata, obtusa, crassiuscula, opaca, leniter canaliculata, 

 marginibus plana ; costa lata cum vel sub apice evanida ; cellu- 

 lis minutis densis quadratis valde chlorophyllosis, angularibus 

 oblongis majoribus laxioribus translucidis : perichaetialia comali- 

 bus similia. 



Flores monoici : masculi gemmacei, axillares vel cladogeni ; 

 paraphysibus subnullis. 



Capsula ovalis, erecta, brevi-pedicellata ; peristomii dentibus 

 16 longis subulatis remote nodoso-articulatis hie illic linea divi- 

 suriali notatis nunquam in crura solutis pallide rufo-purpureis 

 papillosis ; annulo specioso ; operculo conico-aciculari recto ; 

 calyptra mitraeformi longirostra plicata infra capsulam mediam 

 producta, matura profunde 8 - 10-laciniata. 



Ptychomitrium incurvum, Schwajgr. ; Br. & Sch. ; Sulliv. Mosses U. 



States, p. 35. 

 Ptychomitrium pusillum, Br. et Sch. in Lond. Jour. Bot. 1843, p. 665 ; 



Sulliv. Muse. Alleghan. No. 135. 

 Weisia incurva, Schwaegr. Suppl. t. 116. 

 Grimmia Muhlenbergii, Brid. Bryol. Univ. 1, p. 181. 

 Grimmia Hookeri, Drumm. Muse. Amer., No. 61. 

 Notarisia Virginica, Hampe in Linnasa, 11, p. 379. 

 Brachysteleum Hampeanum, C. Mull, in Linnasa, 17, p. 597. 

 Brachysteleum ixcurvum, C. Mull. Synop. Muse. 1, p. 770. 



Hab. On exposed rocks, Eastern New York, and southward 

 to Georgia ; also Southern Ohio. 



