JONES ON THE IBISH LICHENS. 135 



No. 16. — Physcia obscura, var. adglutinata (Nyl.). On old ash, Wo- 

 burn, Co. Down. T. J. 

 No. 138. — Variety. "Woburn, Co. Down. 



T.J. 

 No. 223.— Form. Castle Earnard, Co. Cork. 

 T.J. 

 No. 54. — Physcia parietina {Nyl.). "Woburn, Co. Down. T. J. 



No. 158. — Form. Demesne, Armagh, on 



young trees. T. J. 

 The thallus may be seen, partially leafy at 

 the circumference. 

 No. 119. — Physcia pulverulenta (Schreh., Fr., Nyl.). Demesne, Ar- 

 magh. T. J. 

 No. 222.— Physcia stellaris {Nyl.). Castle Barnard, Co. Cork. T. J. 

 No. 327. — Physcia tenella (Ach.). Form. Curraghmore. T. J. 



No. 148. — Physcia ? Demesne, Armagh. T.J. 



Two plants of Physcia, both abnormal ; 

 possibly form of P. parietina and of P. 

 pulverulenta. 



No. 31 7. — ? Physcia ? also P. parietina. Old walls near Dublin. 



T.J. 

 As this plant never fruits, it must remain 

 doubtful; it somewhat resembles the 

 form of Ph. parietina lychnea (Ach.). 



No. 326. — Physcia ? Form. Curraghmore, on trees. T.J. 



Besembles Ph. ccesia and tribacea. 



Piacodium (PC). 



No. 126. — Piacodium citrinum (Ach.). Sheepwalk, Armagh. T. J. 



Doubtless this is the plant named by 



Ny lander* as P. citrinum (Ach. Flot.), 



and also by Mudd.f It is not rare ; it 



never is true Piacodium. See also No. 1 30. 



No. 46. — Piacodium murorum (Repp). Barclay's Bock, Co. Down. 



T.J. 

 No. 130. — Piacodium murorum (DC. ) citrinum. Sheepwalk, Armagh. 



T.J. 

 See No. 126. 

 No. 318.— Form. Tower Hill, Curragh- 

 more. T. J. 

 No. 344. — Stone walls near Dublin. T. J. 

 No. 345. — Stone walls near Dublin. T. J. 

 No. 43.— Piacodium ? Form. Barclay's Bock, Co. Down. T. J. 



* " Lichen. Scand.," p. 136. f " Manual," p. 132. 



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