I9l6. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 45 



Our (few) Norwegian specimens of var. leptalea agree with Dalmatinian 

 plants, labelled Physcia leptalea NYL. by ZAHLBRUCKNER, only that they 

 are more delicate. 



I am not convinced of the correctness of the synonyms of BITTER, 

 but I cannot decide the question, not having seen the plants of ACHARIUS 

 and SCOPOLI. I have, however, used BITTER'S names, for the reason that 

 I agree with him in his view of the species and because the meaning of 

 his names is clear. 



5- Physciii tribacia. (Acn.?). 



an syn. Lecanora tribacia ACHARIUS Lichenographia Universalis (1810) 

 p. 415. ACHARIUS Synopsis (1814) p. 191. 



Parmelia tribacia SOMMERFELT Supplementum Florae Lappon. (1826) 

 p. 109. 



Parmelia pulverulcnta var. dimidiata ARNOLD Die Lich. des frank. Jura. 

 Flora (1864) p. 594. 



Physcia albinea var. dimidiata NYLANDER Observata lichenologica in 

 Pyrenaeis orientalibus. Flora (1872) p. 426. 



Physcia (stellaris) trib(r}acia TH. FRIES Lich. Scand. I (1871) p. 140 

 (? Thallus KOH+). WAINIO Adjumenta I (1881) p. 135. WAINIO Li- 

 chenes in viciniis . . . Pitlekai. Arkiv for Botanik vol. VIII No. IV 

 (1909) p. 68. 



Physcia dimidiata NYLANDER Addenda nova. Observationes. Flora 

 (1881) p. 537. DALLA TORRE et SARNTHEIM Die Flechten von Tirol (1902) 

 p. 162. HARMAND Lichens de France (1909) p. 626. 



Parmelia dimidiata ARNOLD Lich. frank. Jura Flora 1884, p. 170. 

 ARNOLD Zur Lichenen-Flora von Munchen. Ber. d. Bayr. Bot. Ges. I. 

 (1891) p. 33. 



Exsic. ARNOLD 272 (Parmelia pulverulenta SCHREB. var. grisea LAM.), 

 1367 (Parmelia dimidiata ARN.) MALME Lich. Suec. 156 (Physcia tribacia 

 (AcH.) NYL.). 



Tab. II, fig. 3. 



HARMAND and other lichenologists distinguish between Ph. dimidiata 

 NYL. Flora 1881 p. 537, and Ph. tribacia NYL. Flora 1874, p. 307, the 

 former species having a cortex inferieur a hyphes greles, diriges gene- 

 ralement dans le sens de la surface et ne se distinguant guere de la couche 



