JUNGERMANNIA. 



301 



This genus shews us that difference in the forms of the ela- 

 ters, cannot be considered of generic importance ; it is probable 

 that the double fibre only originates from a continuation af an 

 original simple one. 



I FOLIA DISTICHA INDIVISA. 



1 Jungermannia sp. PI. LXX. Fig. I. 



Caulis prostratus, vage ramosus. Rami subclavati, ascen- 

 dentes, interdum elongati. Fol. arete imbricata disticha, 

 superiora gradatim majora. Concaviuscula, orbicularia, inte- 

 gerrima, areolis oblongis rotundatisve, juniora conduplicata, 

 foliis decurrentibus. 



Radiculae e basi externa foliorum exsertas. 



Folia perianthialia oblongiora majora : suberecta cupulam 

 formantia. 



Perianth tubulosum, membranaceum plicatum, apice aper- 

 tum, sub fimbriat.j basin versus f. perianthialibus adnata. 



Calyptra basin supra circumscissa, vel lacera, membranacea 

 tenuis, persistens, stipes demum deciduus, perianthia longi. 

 tudine vel duplo fere superans. 



Theca 4 valvis, valvis patentissimis lanceolatis rubro-brun- 

 neis : cellulis elongatis, fibre completa vel incompleta. 



Elateres minutaB vix vaginatse, fibra duplicata. 



Pistilla plura minima sessilia stylo brevi circa calyptrae basin 

 disposita. 



Hab. In regione Assamica alta ; ad ripas fluvii (vel rivuli) 

 Man moo, Negrogam versus, agra Singfoensis. Et Deboroo 

 ad Kujudoo et Rangagurrah, agri Muttack. Jan. A. D. 1836. 



Var ? A. Foliis majis opacis. Periantheo dentato. Thecis 

 majis exsertis ; valvis capsulae latioribus. Sporulis globosis 

 laevibus. 



Hab. Mamloo, Collium Kbasyensium, altitudine circiter 

 4300 pedum. 



