IQI6. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 55 



CROMBIE Brit. Lich. (1894) p. 308 (as subspecies). HARMAND Lich. France 

 (1909) p. 635. LETTAU Lich. Thttr. (1913) p. 255. 



The margin of the apothecia crowned by numerous short 

 or long folioli. Thallus without or only with little pruina; the margin 

 of the laciniae more or less crenate or incised. Colour cervine or cervine 

 greyish. 



Our herbarium possesses one specimen of f. venusta from Croatia, 

 collected by BAUMGARTNER, which is entirely conformable to the description 

 of ACHARIUS. The margin of the laciniae is so incised that the whole 

 thallus acquires a microphylline appearance and the apothecia are almost 

 hidden in the crown of folioli. Such specimens are unknown in Norway. 

 Mr. BAUMGARTNER has informed me that he cannot regard the venusta 

 as a proper species, and I am of the same opinion. 



Specimens of var. allochroa with more or less crowned apothecia and 

 nearly epruinose laciniae are frequent in Norway, and some of them are 

 so conspicuously crowned that they might be referred to f. venusta, 

 (Mosterhavn, HAVAAS and LYNGE), but all intermediate states are found. 



NYLANDER found a stratum thalli cortical e cellulosum *. Our spe- 

 cimen from Croatia has a cortex similar in structure to that of the typical 

 Ph. pulverulenta. 



7. Physcia, muscigena (Acn.) NYL. 



Parmelia muscigena ACHARIUS Lich. Univ. (1810) p. 473. Synopsis 

 (1814) p. 212. 



Lichen muscigenus WAHLENBERG Flora Lapp. (1812) p. 422. 



Physcia pulverulenta var. muscigena NYLANDER Synopsis I (1860) p. 

 420. TH. FRIES Lich. Arct. (1860) p. 63. NYLANDER Lich. Scand. (1861) 

 p. no. KINDT Bidrag til Kundskab om Trondhjems Lavvegitation. Kgl. 

 Vid. Selsk. Skr. (1880, edit. 1881) p. 29. HARMAND Lich. France (1909) 

 p. 636. LYNGE Busk- og blad-laver Berg. Mus. Aarb. (1910) no. 9 

 p. 104. 



Physcia pulverulenta subsp. muscigena WAINIO Adjumenta I (1881) 

 p. 131. ARNOLD Jura (1885) p. 60. CROMBIE Brit. Lich. I (1894) p. 309. 



Physcia muscigena NYLANDER Prodromus Lich. Gall. (1857) p. 308. 

 DALLA TORRE et SARNTH. Die Flechten von Tirol (1902) p. 157. 



NYLANDER Synopsis 1. c. 



