200 LICHEN ACEI. [RAMALINA. 



Hob. On rocks in maritime districts. Distr. Very local though plen- 

 tiful where it occurs, in the Channel Islands and S.W. England. B. M. : 

 Mont Orgueil, Island of Jersey. Near Land's End and Penzance, Cornwall ; 

 St. Mary's, Stilly. 



13. E. geniculata Hook. & Tayl. Lond. Journ. Bot. 1844, p. 655. 

 Thallus moderate or somewhat small, subrounded or subcom- 

 pressed, smooth, or obsoletely longitudinally subnervose, csespitosely 

 and subfastigiately branched, pale or pale straw-coloured, often 

 terebrate with scattered perforations, fistulose within ; branches 

 usually attenuate (medulla K ). Apothecia small, terminal or sub- 

 terminal, pale-testaceous or glaucous-white, the receptacle smooth 

 or rugulose ; spores oblong or f usiformi-oblong, straight (or obso- 

 letely slightly curved), 0,009-0,015 mm. long, 0,004-7 mm. thick. 

 - Nyl. Bull. Soc. Linn. Normand. ser. 2, iv. p. 163; Cromb. Journ. 

 Bot. 1876, p. 360 j Leight. Lich. Fl. ed. 3, p. 90. 



Resembles R. pu-siUa Le Prev., a plant found in Portugal but not 

 reaching our Islands : it is distinguished by the cortical texture and the 

 shining, smooth, and more freely divided thallus. To the following species 

 also it presents several points of alliance. It is interesting as one of the 

 exotic plants which extend to W. Ireland. In the British specimens the 

 apothecia, which are appendiculate, are very sparingly present. 



Hub. On stems of shrubs (thorns) in maritime districts. Distr. Ex- 

 tremely local and scarce in N.W. Ireland, though we may expect to find 

 it in the S.W. also. B. M. : Killery Bay, Connemara, co. Galway. 



14. R. minuscula Nyl. Bull. Soc. Linn. Normand. se'r. 2, iv. 

 (1870) p. 164. Thallus small, subrounded, shining, soft, subpel- 

 lucid, very finely longitudinally striatulate, csespitosely branched, 

 straw-coloured or pale straw-coloured, branches attenuato-ramulose 

 (medulla K ). Apothecia small, terminal, plane or convex, yel- 

 lowish flesh-coloured or glaucous, the receptacle smoothish beneath ; 

 spores oblong or fusiformi-oblong, straight, 0,009-0,015 mm. long, 

 0,004-6 mm. thick. Cromb. Grevillea, vii. p. 142. Ramalina 

 caJcaris f. minuscula Nyl. Sivllsk. pro F. et Fl. Fenn. Forh. n. s. v. 

 (1866) p. 114. 



This might be taken for a small, narrow state of R. fastigiata, or for a 

 young condition of R. calicaris. It is, however, a very distinct species, 

 differing from the preceding in the smaller and softer thallus, which is 

 scarcely more than \ inch in height ; it occasionally presents small scat- 

 tered oblong perforations. In British specimens the apothecia are very 

 rare. 



Hob. On the branches of stunted larches, and erratic on rocks in 

 a wooded mountainous district. Distr. Very local and scarce, found only 

 among the N. Grampians, Scotland. B. M. : Craig Cluny, Braemar, 

 Aberdeenshire. 



