I916. No. 8. MONOGRAPH OF THE NORWEGIAN I'HYSCIACEAE. 29 



Univ. (1810) p 477, AcHARius Synopsis (1814) p. 215. Sommerfelt 

 Supplem. Fl. Lappon. (1826) p. iii. 



Fliyscia stcllaris Fr. Nylander Synopsis (i860) p. 424. 



Physcia s/e/iaris var. aipolia Nylander Lieh. Scand. (1861) p. iii. 

 Ph. sfellaris u adprcssa var. aipolia Th. Fries Lieh. Scand. I (1871) p. 139. 

 Lynge Busi< og bladlaver (1910) p. 103. 



Pliyscia aipolia Nylander Addenda Nova Flora (1870) p. 38. Wainio 

 Adjumenta I (1881) p. 135. Crombie Brit. Lieh. (1894) p. 313. Hue 

 Lieh. Extra-Eur. (1900) p. 60. Dalla Torre et Sarntheim Die F'lechten 

 von Tirol (1902) p. 158. Elenkin Lieh. Ross. Med. {1907) tab. V, fig. 8. 

 Harmand Lieh. France (1909) p. 619. Sandstede Flechten d. n.w. deutschen 

 Tieflandes (1913) p- 234. 



Dalla Torre and Sarntheim write (1. e.) y> Physcia aipolia (Ehrh.) 

 Nyl «, founded on Ehrhart PI. crypt, exsiee. 207 (1785). I have not the 

 plant of Ehrhart before me, and cannot decide whether it reallv is our 

 species. Anyhow the combination of the said authors is incorrect, for 

 Ehrhart named his plant -»Lichen afiidigiiits«, not »Lichen aipolius«. 

 According to the Schedae of Zahlbr. Krypt. Exsice. no. 1980, the col- 

 lection of Ehrhart is not valid as a foundation for lichenologieal nomen- 

 clature. 



Exsice. Anzi Lieh. Ital. sup. 117 (var. acrita, s. n. Pannelia stel- 

 laris var. anibigiia). Claud, et Harm. Lieh. Gall, praec. 127. Cummings, 

 Williams & Seymour Lieh. Bor. Amer. Ed. Il, 168 (var. acrita, s. n. 

 Physcia stellaris (L) Tuck.). Floerke Deutsche Eichenen (var. acrita, s, n. 

 Parnielia aipolia Ach.). Havaas Lieh. Norv. 215 (var. anfhelina). Hepi» 

 Flechten Eur. 877 (var. acrita). Leighton Lieh. Brit. 6 (var. acrita, s. n. 

 Parnielia stellaris Ach.). Malbranche Lieh. Norm. 25 (var. acrita s. n. 

 Physcia stellaris). Malme Lieh. Suée. 205 (inter anthclinani et acritani). 

 Massalongo Lieh. Ital. 318 (A. var. acrita B. var. anthelina, s. n. Squa- 

 maria aipolia Mass.), Migula Krypt. 92 (var. acrita). Schaerer Lieh. 

 Helv. 350 (var, acrita). Stenhammar Lieh Suec. 73 inf. (var. acrita, s. n. 

 Parmclia stcllaris Fr.). Zahlbruckner Krypt. Exsice. X'indob, 2078 

 (var, acrita). 



Thallus middle-sized or large, orbicular, diani. up to 11 — 12 cul, 

 rigid, closely appressed to the substratum and attached through 

 branched rhizinae of dark or pale colour. Laciniae stellate, of varying 

 length, I — 1,5 mm. broad, usually broader, up to 2 — 2.5 mm. at the ends, 

 and rounded, crenate or incise. Laciniae either repeatedly furcate or 

 pinnate, with many short lateral branches; in .some varieties they are 

 contiguous or even imbricate, in others discrete. They have an irregularly 



