RADULA. 75 



X '65 mm., postical lobe '45 mm. x '3 mm., antical lobe 1' mm. x 

 •8 mm., postical 'G mm. x '4 mm., antical '9 mm. x "75 mm., pos- 

 tical '4 mm. X •35 mm., antical "9 mm. x "8 mm., postical '4 mm. 

 X "3 mm. ; cells '02 mm. ; bract, antical lobe 1* mm. x "9 mm., 

 postical '7 mm. x "4 mm. ; perianth 2* mm. x I* mm. wide at the 

 mouth, perigonial bracts, antical lobe '6 mm. x "3 mm., postical 

 •4 mm. X "3 mm., antical "7 mm. x "3 mm., postical '4 mm. x 

 •3 mm. ; antheridia '2 mm. 



Hab. — On wet rocks, very closely attached. Eare ; fertile 

 plants extremely so. 



7. Tyn-y-Groes, Merionethshire, April 1876, IF. H. P.; 1885 

 G. A. Holt (cum fr.). Cwm Idwal, Carnarvonshire, JF. II. P. 

 Llanberis, Carnarvonshire, /. Cash and W. II. P. 12. Grasmere, 

 Westmorland, Rev. C. II. Binsiead. Lodore, Cumberland, 

 TF. H. P. Stonethwaite, Cumberland, /. R. Bijrom and IF. //. P. 

 16. Moidart, West Inverness, S. M, Macvicar (cum per). T. Near 

 Bantry, Miss HiitcUns. Killarney, Br. Carrinyton (cum per.). 

 Glena, Prof. Lindhcrg, Knockavohila, Br. Taylor. Killarney, 

 Br. Moore, &c. Blackstair, Slieve Donard, Co. Down, Rev. C. H. 

 Waddell. 



Obs. — Distinguished from Radida complanata (L.) by its 

 inflorescence and olive -brown colour; from Radida Carri?iytoni, 

 Jack, see notes under that species. 



It is easily recognised by the swollen base of its leaves, the 

 perigonial bracts being remarkably tumid. 



Radida physoloba, Mont., from Auckland Island, is a different 

 species. 



Description of Plate XXV. — Fig. 1. Plant natural size. 

 2. Portion of stem, antical view x 24 (C. & P. n. 43). 3-7. 

 Leaves x 24 (Ireland, Taylor). 8. Portion of leaf x 290 (ditto). 

 9. Perianth with bract x 16 (ditto). 10. Portion of male stem, 

 postical view x 24 (C. & P. n. 43). 11, 12. Perigonial bracts 

 X 24 (ditto). 



