lIooKE — On Irish Hepaticm. 



Sub-tribe 7. AcnoBOLBEiE. 



Involucre terminal on torus, bulbous and 

 rooting from underside. Colesule -svant- 

 Calyptra adhering to the bulbous 



599 



base of the receptacle, 



ACEOBOLBITS. 



Sub-tribe 8. Fossoudbeo^^ie^. 



Involucral bracts two, opposite. Colesule want- 

 ing. Calyptra exserted, cylindrical, longer 

 than inTolucral bracts. Capsule of thick 



texture. Elaters single-spired, 



Colesule 



Involucre scale-like or wanting. 



campanulate, wide-mouthed, margin un- 

 dulate or lobed. Capsule one-valved, 

 globose, bursting irregularly, 



Involucre connate with the colesule. Colesule 

 angularly campanulate, mouth wide, un- 

 dulate-dentate. Capsule sphaeroid, burst- 

 ing iiTegularly, ..... 



Involucre monophyllous, cut and lacerated. 

 Colesule tubulose, exserted. Calyptra irre- 

 gularly torn at the apex. Capsule oval. 

 Androecium dorsal on the midrib of the 

 frond, ....... 



Involucre undivided, bladder-shaped, attached 

 to apex of fi'ond. Colesule inclosed within 

 the utricular involucre. Androecium im- 

 mersed in the frond, and covered with 

 dentate scales, ..... 



SCALIA. 



FOSSOITBEOKTA.. 



PETALOPHTLLUil . 



P ALL AVICI JflA. 



Blasia. 



Involucre cup-shaped, toothed, and lacerated 

 at the mouth. Colesule wanting. Calyptra 

 oval, membranous. Androecium immersed 

 in the upper sui-face of midrib of frond, , Pellia. 



Sub-tribe 9. METZGEHiEiE. 



Involucre monophyllous, scale-like, ventricose, 

 and two-lobed. Colesule wanting. Calyp- 

 tra ascending, oblong-ovate, echinate. In- 

 ' florescence dioecious. Antheridia inclosed 

 by a 1 -leafed involucre on the under side 

 of midrib, ...... Metzgehia. 



