394 HEPATIC^. 



long X 1" mm. broad; pedicel '15 mm. diam. ; capsule "6 mm. x 

 '5 mm., "75 mm. x '6 mm. 



Hab. — Luggielaw, Co. Wicklow, Ireland, D. Orr, 1851, 

 detected by the late Professor Lindberg amongst specimens of 

 Andrpcem sent him to be named. 



Found in alpine situations on the Continent — Tyrol {JPanch, 

 Arnold, Breidler), Norway {Berggren, Bijan, and Kaurin, c. fr.). 



Obs. — This is peculiarly an alpine species, being only found at 

 a considerable altitude. 



I am rather afraid some mistake has been made in the speci- 

 mens purporting to be from Ireland, the packets having possibly 

 got mixed ; however, the specimens of the supposed original plants 

 from Ireland are true C. revoJuta. 



In general appearance like an Andreaa. 



From all other species distinguished at once by the margin of 

 the whole leaf being evenly revolute. 



Some forms of MarnupcUa cmarglnata (Ehrh.) have their leaves 

 a little reflexed, but never approach to the same regularity as in 

 C. revoluta. 



In habit this s])ecies resembles a true Marsi/pe/la, with which 

 it also agrees in its sterile pistillidia surrounding the base of tlie 

 calyptra. On the other hand, it agrees with Cesia in having no 

 true perianth, but only a few small bracts with no approach to 

 adherence either to the outer bracts or to each other, and thus 

 well illustrates the position taken by Dr. Spruce that the characters 

 depended upon for the separation of Cesia ivoxn MarsujjcIIa, namely, 

 the presence or absence of a perianth and the position of the 

 sterile pistillidia, are not to be relied upon. 



I am indebted to Mons. Philibert, " Kev. Bryol." 1890, for 

 the observations on these characters. 



Description ot' Plate CLXXIII. — Fig. 1. Plants natural size. 

 2. Portion of stem x 16 (Luggielaw, D. Orr). 3-8. Leaves x 24 

 (ditto). 9. Portion of leaf x 290 (ditto). 10. Outer bract x 24 

 (Norway, Kaurin & Ryan). 11. Leaf and bracts x 24 (ditto). 

 12. Section of outer and inner bract x 31 (ditto). 13. Inner- 

 most bract X 24 (ditto). 



