98 BERNT LYNGE. M.-N. Kl. 



(I have only seen one thallus locally covered with at thin white pruina); 

 colour brownish or greyish-brown, darker at the centre. 

 Soredia of the same colour or whitish. Under side uncoloured with nume- 

 rous short rhizinae, which are uncoloured or brown. 



Upper cortex of variable thickness, from 20 to 50, rarely 80 n thick. 

 Hyphae plectenchymatous, septate with rounded articuli. Exterior articuli 

 dark, impellucid, interior ones uncoloured. Medulla white, hyphae loosely 

 interlaced, gradually transformed into the lower cortex, which has hyphae 

 more parallel to the surface. 



Apotheçia sessile or very shortly pedicellate, scattered and rounded 

 I — 2 mm. in diam., or more numerous and angulose, owing to mutual 

 pressure. Margin crenate, frequently sorediate, receptacle rugose 

 paler than the thallus. Disc plane, epruinose or very rarely caesio-pruinose, 

 black or brownish-black, moistened brown. The cortex of the receptacle 

 75 — 90 a thick, uncoloured, hyphae plechtenchymatous, perpendicular to 

 the surface, at least at the exterior part. Hymenium 80 — 100 1.1 thick, at 

 the exterior part brown, otherwise uncoloured. Paraphyses moderately 

 clavato-incrassate, constrictedly septate, individed or sometimes furcate at 

 their apices. Spores ellipsoid, rounded at their ends, straight or slightly 

 curved, a little narrowed at the septum, 16 — 22« long, 8 — 11,5 a thick. 

 Spore-rooms angulose. 



Pycnides immersed, conical or depresso-globose, diam. 100 — 175 u. 

 Perifulcrium uncoloured except at the ostiolum, where it is dark. Fulcra 

 undivided, endobasidial, short, constrictedly septate, articuli 4,5 — 5 a long, 

 and 3,5 — 4 u thick. Pycnoconidia straight, slightly apiculate, 3,5-4 u long, 

 and 0,5 — I a thick. 



React. Cortex and medulla yellow by KOH, no colour with 

 CaCUOo. Hymenium persistendy blue or dark bluish-black with J. 



var. stellata, n. var. 



Physcia intermedia Wain. 1. c. 



Tab. II, fig. 2. 



Thallus orbicularis, parvulus, diam. 2—3 cm., laciniae angustae, elongatae, 

 bene radiantes, discretae vel subcontiguae ; soredia parva dispersa. 



Lo c. In Norway it is found on micaceous ground in Northern Norway, 

 chiefly along the shore, but also in the interior: Pasvikelven (third cata- 

 ract) and Sjaaholmen in .Sydvaranger (Th. Fries s. n. P. caesia), Tromsø 

 amt: Sørkjosen, Skibotn, Lyngseidet, Tromsøen, Nordbynesset (Lynge). 



