36 BERNT LYNGE. M.-N. Kl. 



There are two formae in Norway: 



1) Probably the type of NYLANDER. Laciniae closely appressed to the 

 substratum, very multifid with short interstices and divergent branches, 

 branches fitting into one another like mosaic, more rarely stellate. Their 

 outline is crenate. Lower side and rhizinae pale (in our plants). 



Apothecia very numerous, small (diam. up to i mm.), margin entire, 

 thin, disc epruinose. Spores small: 15,6 21 f.i long. 7,6 8,7 ft thick. 



Known from Finmarken : In the Tana valley at Storfossen, Seilnes, 

 and Bassevuovde (NORMAN), in Alten at Reipas (ZETTERSTEDT); from Tromse 

 amt: Indset in Bardo (LYNGE). 



2) f. pruinosa LYNGE n. f. Laciniae adpressae, parcius ramosae, 

 interstitiae ramorum longiores, angula axillarum acutior et earn ob causam 

 thallus habitum plus stellatum habet; laciniae margine minute crenulatae. 

 Thallus subtus albidus, rhizinae subconcolores vel dilute fuscescentes. 



Apothecia majora (diam. usque 2,5 mm.), margine crasso integro 

 circumdata, discus planus, intense caesio-pruinosus. Sporae parvae: 

 17 21 (23) (.i longae, 7,9 10,5/4 crassae. Pycnides desunt. 



Salicicola, in insulam Tromse (NORMAN). 



NYLANDER'S var. angustata is fusconigro-fibrillosus. The rhizinae 

 of the Norwegian plants are either quite uncoloured or pale brown. I do 

 not attribute much importance to this difference. 



I have not been able to see an authentic specimen, and the descrip- 

 tion, given by NYLANDER in his wonted lapidary style, is insufficient for 

 a certain determination. It is impossible to refer the Norwegian plants to 

 any other variety of Ph, aipolia, and if they should be different from NY- 

 LANDER'S var angustata, they must be given a new name. In that case I 

 should propose the name Physcia aipolia var. nordlandica LYNGE. 



3. Physcia ascendens BITTER. 



Borrera tenella a ACHARIUS Lich. Univ. (1810), p. 498, ubi syn. 



Physcia stellaris $ adscendens (PR.) TH. PR. a tenella (WEB.) TH. PR. 

 Lich. Scand. I (1870) p. 140. 



An syn.: Physcia stellaris var. tubulosa WALLR. in WAIN. Lich. Vib. 

 (1878) p. 50. Laciniis adscendentibus, apice inflate, tubulatis et ibidem 

 intus sorediosis. 



