1 91 6. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 87 



Physcia pan-iila Wainio Lichenes \'iburgenses. Meddel. Soc. Fauna et 

 Flora Fennica vol. II (1878) p. 52. Olivier Lichens d'Europe I (1907) p. 246. 



Physcia orbicularis d. sciastrella Dalla Torre et Sarntheim Die Flech- 

 ten von Tirol etc. (1902) p. 167. 



Physcia sciastreUa Harmand Lichens de France (1909) p. 651. tab. 



X\'I, fig. 8. Lettau Beiträge zur Lichenographie von Thüringen. Hed- 



wigia vol. LII (1912! p. 255. 



Exsic. Arnold 583 (non vidi I. Lojka Lieh. Univ. 223 (non vidi), 



XoRRL. et Xyl. Herb. Lieh. Fenn. 219. 



Waimo collected the plant of Xorrl. et Xyl. 219, and Nylander has 

 recognized the determinations. On the label it is stated that Ph. pan'ula 

 Wain, is a svnonym of Ph. obscura f. sciastrella Xyl. Olivier (1. c.| 

 enumerates them as two different species, but the above statement by the 

 two »patres nominum^ must in this respect be decisive. 



The priority of the name must be based upon Xylander in Arnold 

 Lieh. Exs. 583: ^ Pannelia obscura (Ehrh.I var. sciastrella Xyl.« The 

 names in Flora 1874 and 1877 are only Xomina nuda. without descrip- 

 tion. I have been unable to ascertain the exact date of publication of 

 Arnold 583 ; it was mentioned in Flora 1874 p. 569 and therefore most 

 probably appeared before 1874. (No. 446 was published in 1871, and Xo. 

 737 in 1S79I. In that case Wainio's name from 1878 is a later name. 



Thallus growing in small irregular patches 1 — 1,5 cm. in 

 diam., but frequently confluent. Laciniae ascendant to erect, very 

 thin (70 — 90 /<), loosely imbricate, short and very narrow 10,2— 0,3 mm. 

 broad) with undulate or incise margin, either dilated at their apices like 

 a fan and profoundly d i gitato-laciniate ,; 



or equally broad and profoundly lacerate 

 orpinnato-incise. Laciniae atthemar- 

 gin instructed with pedicellate, fur- __ ^ 



furaceous or rather elongate, bran- ^tw ^/%. ^^**^ 



^x ' ^Sit*- ^?**^ ^'' " ' 



ched, coralliform isidia. If the cortex y ~" «^^ ,/ _ -, 



^ ■ . ^ * ' -^ 



of the isidia is broken off, medullary hyphae • *^ - 



sometimes grow out forming pseudosoredia. . , '> 



genuine soredia not developed. Thallus \^/ m i^ Y ^ 



opaque, colour V a ry i n g from pale grey ~ n. - ^ - 



to gre vish-bro wn or even brownish- F'g- lo- 



, , , " , . , . , • Phvscia sciastrella (Nyl.) Harm. 



black, when moistened with a strong tmge 



of green. Lower side uncoloured. 



Upper cortex 15 — 25 « thick, surface unequal, insperse, more or less 



opaque at the exterior part, otherwise uncoloured. Hyphae indistinct, 5 — 6 a 



thick, constrictedly septate with rounded articuli, occasionally less constricted. 



