39 



DICRANUM PIIASCOIDES. 



Cryptogamia Musci. Nat. Ortl. Musci. 



Gen. Char. Seta terminalis (Fissidentibus quibusdam exceptis). Pe- 

 ristomhm^ simplex, e dentibus sedecim, bifidis, aequidistantibus. 

 Calyptra dimidiata. 



Dicranum pJiascoides ; caulibus laxe ca^spitosis simplicibus erectis, 



foliis erectis subulatis integerrimis, nervo mcdiocri, capsula ob- 

 longa perichaetialibus immersa, operculo conico-acuoiinato, ore 



F 



annulate. (Tab. XXL) 

 Hab. Apud Sylhet Indiae Orientalis. D. Wallich. 



Caules subunciam longi, laxe caespitosi, erecti, flexuosi, simplices, ru- 

 bicundi. Folia undique inserta, erecta, subulata, omnino inte- 

 gerrima, laxe et obscure reticulata, tenuissime membranacea, 

 flavo-viridia, nervo medioeri ad aplcem attingente instructa, floris 

 masculi vix nervosa, basi insigniter vaginantia, dilatata. Flores 

 utriusque sexus terminales. Capsula oblonga, basi sublatiore, 

 seta brevissima terminans, foliis pericheetialibus immersa, laevis, 

 fusca. Calyptra mihi ignota. Operculum brevi-conicum, ros- 

 tratum. Perhtomium e dentibus 16, rubris, bifidis, erecto-pa- 

 tentibus, striatis, annulo pellucido e serie sinipb'ci cellulorura 

 constructo, cito deciduo, cinctis. 



I REGRET that I have not seen the calyptra of this very in- 

 teresting moss, which has so little the appearance of a Di- 

 cranum in its external habit, that, were it not for the very 

 perfect state of the peristome in the specimens sent, I should 

 scarcely have ventured to place it in that genus. Amongst 

 the Dicrana, however, if such they still may he called, it 

 comes nearest to that division which includes our D. flex- 

 uosum; but in them the calyptra is ciHated at the base, the 

 nerve of the leaf is broad, and the seta is of consideraljle 

 length. 



