1*10 GRAPIIIDEI [aRTHONTA 



Dolgellcy, ^Merioneth ; Fulls of Clyde, Lanarkshire; Ikircaldine, 

 Argyll ; Diiukekl, Terthshire ; Old i)roniore and Croinaglown, Kil- 

 larney, Kerry ; Dronioland, Clare ; Adare, Lirnerick ; Shane's Castle, 

 Antrim. 



Var. pruinata A. L. Sm. — Thallus whitish, sometimes fur- 

 furaceoiis. Apothcciji blackish, covered with a \vhit(5 pruina. — 

 Vars. concolor and microstigma Mudd Man. pp. 249 ct 250 (1861). 

 Spiloma gregarinm vars. concolor and micro.stujma Turn. Sr, 

 Borr. /. c. Coniocarjjon cinnahariuum \'ars. concolor and mi- 

 crostigma Leight. Z. c. Arthonia cinnaharina var. pruinata Del. 

 ex Nyl. Lich. Scand. p. 257 (1861); Cromb. Lich. .P>rit. p. 102 ; 

 Leight. Lich. Fl. p. 399 ; ed. 3, ]). 422 incl. If. concolor and 

 microstigma. 



Exs'icc, Leight. n. 251. 



The white powdery apothecia are often arranged in a stellate form, 

 sometimes they are solitary and depressed (var. ^microstigma), when 

 the thallus also is white suffused it is var. concolor. 



Hah. On trees in S. and N. England and in S.W. Ireland. — 

 B. M. Shanklin, I. of Wight ; near Becky Falls, Devon; near Lynd- 

 hurst, New Forest ; St. Leonard's Forest, Sussex ; near Dorking, 

 Surrey ; Twycross, Leicestershire ; Easby Wood, Airyholme Wood 

 and Kildale, Cleveland, Yorkshire ; Eagle's Nest, Killarney, Kerry. 



Var. anerythrea A. L. Sm. — Thallus vv'hitish, Apothecia 

 brownish-black, prominent, naked. — Arthonia cinnaharina var. 

 anerythrea Nyl. I. c. ; Cromb. Lich. Brit. p. 102; Leight. Lich. 

 Fl. p. 400 ; ed. 3, p. 423. 



Differs from the species and the other varieties in the round 

 prominent apothecia without any pruina. 



Hah. On trees. — Distr. Rare in S. England and in S. and W. 

 Ireland. — B. M. Near Becky Falls, Devon ; near Lyndhurst, New 

 Forest, Hants ; Castle Bernard and Crosshaven, Cork ; Glencar, 

 Kerry. 



5. A. astroidestera Nyl. in Flora Ivii. p. 13 (1874). — Thallus 

 white or cream-coloured, thin, smooth. Apothecia dark-brown, 

 innate, slender, elongate, radiate or stellate ; spores 3-5-septate 

 (usually 4-septate), colourless, 0,021-26 mm. long, 0,007-8 mm. 

 thick ; hymenial gelatine blue with iodine. — Cromb. in Journ. 

 Bot. xii. p. 149 (1874); Leight. Lich. Fl. ed. 3, p. 424. A. 

 armoricana Cromb. Lich. Brit. p. 103 (1870) (non Nyl.); Leight. 

 Lich. Fl. p. 401. A. punctiformis Mudd Man. p. 247 (1861) pro 

 parte 1 (non Ach.). 



The specimens collected by Larbalestier and Crombie, now in the 

 British Museum, have 4-celled spores, the upper cell being larger than 

 the others, and resembling the spores of A. gregaria ; the apothecia 

 are partly white-suffused, and have no trace of the red-colouring 

 matter usually to be found in that species. Mudd describes the 

 spores of his A. j^unctiformis as 3-septate, the upper cell largest. 



Hab. On holly or beech.— Disi^r. Rare in S. England and S. 

 Ireland. — B. M. Lyndhurst, New Forest, Hants. 



