I916. Xo. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 53 



Exsic. Malme Lich. Suec. i8o. 



Tab. II. fig. 4. 



Differs from var. allochroa in having long, narrow laciniae, 

 which are dichotomously and more divaricately branched, 

 entirely discrete or only contiguous at the apices. Laciniae continuous 

 from the centre to the circumference. Colour deep nut-brown or 

 greyish-brown, moistened greenish. The laciniae may be somewhat shin- 

 ing; they are pruinose, especialh' at the apices, pruina white or fre- 

 quently with a tinge of violet. Owing to the divaricate branching of the 

 laciniae the thallus is seen resting on a cushion of conspicuous, long, 

 thickly branched, black rhizinae. 



Apothecia not rare, usualh- pruinose, but often naked (even in the 

 same specimen), with thin usually entire margin, without or (rarely) with 

 folioli. 



Otherwise as in the tN'pe and connected with it b\' innumerable inter- 

 mediate states with shorter, more or less contiguous laciniae. The colour 

 is probably the best criterion. 



»Tj'pical« states are frequent in Northern Norway — mixed with the 

 intermediate states — on the smooth bark of Ahins iiicana along the 

 rivers: Lyngen (Kitdalen, Lulle, and Lyngseidet, Lynge). Maalselven 

 (Solli, Likkavarre, Stremsmo, LvngeI; from Saltdalen (hb. Sommerrfelt), 

 T^'pical states are not frequent in Southern Norwa\', but intermediate 

 states are often seen. Norderhov (hb. Norman), Minne near Eidsvold 

 (Lynge), near Kristiania (Kolsaas and Leangen, Lynge). Western Nor- 

 way: \'o3s (Br^'nsbro, Havaas). 



f. superfasa A. Zahlbr. 



Pliyscia piilvendoita f. superfusa A. Zahlbr. Krypt. Exsic. (1909) no. 

 1670. Harmand Lich. France (1909) p. 634. 



Tab. II fig. I. 



Differs from var. angustata in having still longer and narrower laci- 

 niae, which are entirely covered by a white pruina; laciniae 

 dichotomously and divaricatel}- branched. 



Specimens from Northern Norway (Stremsmo in Bardo, Lynge) agree 

 entirely with the authentic specimens of Zahlbruckner: they are found 

 on the smooth bark of Sorbus Aucuparia and Alntis iucana, associated 



