266 HEPATIC^. 



Moss, Castle Douglas, /. McAndreio ; Moors at Loch Skene, 

 W. NichoL 15. G^ii'Vi. GoYm, Sir W.J. Hooker ; Ben-na-Board and 

 Glen Dole, Forfar, A. Croall. 16. Moidart, West Inverness, 

 common, -5'. M. Macvicar. 17a. Sutherland Mountains, Dr. 

 Greville. 



I. Wicklow Mountains, Br. Taylor; near Bantry, Miss 

 HutcJiins] Killarney, Dr. Carrington, Prof. Lindberg, and 

 others. 



Found on the Continent and in North America. 



Obs. — Distinguished from all other round-leaved species with 

 stipules, by the presence of the very copious rootlets, the thick 

 leaves, entire bracts and laterally compressed perianth ; from 

 Mylia anomala (Hook.) by the never acuminate leaves, presence of 

 minute warts on the epidermis of the leaves and perianth, and the 

 mouth of the perianth being ciliate. 



The easiest way to examine the epidermis is to detach a 

 leaf from the plant, bend it on the object-glass, place on it 

 carefully the cover-glass and examine in water with a \ inch, 

 when the minute warts can be seen, about 7 or 8 on each cell. 

 The copious, dense rootlets cause the stems to be separated with 

 difficulty. 



I once found a perigonial bract quite bifid, also an imperfect 

 perianth from which a perfect capsule projected, which, when 

 flattened out like a bract, was subquadrate, emarginate, with the 

 whole of the margin ciliate-dentate. 



Description of Plate CIX. — Fig. 1. Plants natural size. 

 2. Portion of stem, antical view x 11 (Ireland, Lindberg). 

 3-5. Leaves x 11 (ditto). 6. Cross-section of leaf, showing 

 epidermis with the minute warts, free (ditto). 7. Portion of 

 leaf X 290 (Linton, Yorks., Holt). 8, 9. Stipules x 85 (Cwm 

 Bychan, North Wales, Holmes). 10, 11. Bracts x 16 (Linton, 

 Holt). 12. Bracteole x 24 (ditto). 13. Perianth x 11 (ditto). 



14. Cross-section of upper portion of perianth x 11 (ditto). 



15. Cross- section of middle portion of ])eriantb x 11 (ditto). 



16. Cross-section of lower portion of perianth x 1 1 (ditto). 



17. Portion of the mouth of perianth x 85 (ditto). 18, 19. 



