TÇIO. No. 8. MONOGRAPH OF THE NORWEGIAN PHYSCIACEAE. 4 1 



React. Cortex faint yellow by KOH, medulla unaltered, no colou- 

 ring with CaQjOo. Hymenium intensely and persistently blue with J. 



Hab. On the trunks of deciduous trees, especially in open situations 

 ^avenues &c). One of the few Pftysciae which is frequently found on 

 Betula. Also found on old wood (fences &cl, and (rarely) on stone. 



Loc. Physcia tenella is a lowland species, but not confined to the 

 southern lowlands. It has been recorded as far north as Alten and Tromse 

 (miserable specimens), and in luxuriant specimens as far north as Bodo. 

 It has not been recorded from the more continental districts of our 

 countr}' (the south-eastern valleys, in the s. e. lowlands only from Minne 

 near the great lake Mjøsen. It is therefore evidently a coast species. 

 — Many phanerogamous plants also have the northern limit of their conti- 

 nuous distribution about Lofoten, e. g. Anemone Hepatica, Xarthedum 

 ossifragjwt and BUchtmm S pi cant. 



Pltyscia tenella is very frequent or even abundant about Kristiania: Tøien. 

 Nitedalen (MoeI. Hakedalen, Brjn, Bærum, and (the lower parts of) Nord- 

 marken (Lynge I. Minne (Lynge). Frequent along the south and west 

 coast and fjords : Hvaler, and Sandefjord (Lynge), Larvik (Norman), Linger 

 (Lynge), Moster (Havaas and Lynge), Fane at Stend (Havaas), Strandebarm 

 (Lillefosse), Granvin: Havaas (Havaas and LyngeI, also at \'oss (Havaas). 

 Abundant about Trondhjem : Stjerdalen (Sommerfelt), Ladehammern and Ils- 

 viken (Kindt), Sorgenfri (L^-xge), Frosta (Jørstad), Namsos (Malmgren). 

 Nordland : Bodo (Sommerfelt). I have searched for it in vain in Tromsø amt, 

 but there is a specimen from Tromsø in our herbarium (Normal). Fin- 

 marken: Bjørnstad in Alten (hb. Norm.\n). 



var. marina (E. Nyl.) Lynge comb. nova. 



Liehen tenellus ß Wahlenberg Flora Lapponica (1812) p. 435 (I have 

 seen his specimens from > pétris denudatis prope littora maris <, but not 

 from >parietibu5 ligneis^). 



Physcia stellans var. marina E. Nyl.\nder Alands Laf-vegetation 

 (1857) p. 86. 



Physcia stellans var. subobscura Nylander Ad vegetationem Helsing., 

 Savol. et Alandiae addenda (1858— 1859) p. 239 Nyl.ander Lieh. Scand. 

 (1861) p. III. Nylander Synopsis (1858— 1860) p. 426. Crombie Brit. 

 Lieh. I (1894) p. 311. Knowles The Marit, and Marine Lichens of Howth 

 (1913) p. 125. 



Physcia caesia* leptalea Th. Fries Lieh. Arct. (i860) p. 65. 



