ig21. No. 7. STUDIES ON THE LICHEN FLORA OF NORWAY. gy 



distinct stalk. Mono — or rarely polyphyllous, efibrillose or sometimes 

 with a few marginal fibrillae, incise, with more or less elongate, often obli- 

 que lobes, truncate or + lacerate at i^'eir ' -vices. Thallùs • tow -ds the 

 marginal parts radiately rugose and more or less perforate, at times quite 

 fenestrate, perforations rounded or radiately elongate. Thallus not — or 

 only occasionally — perforate at the centre, but wrinkled-reticulate (like G. 

 proboscidca). Short bundles of undivided, furcate or ramose /ibri/lae on the 

 upper side (like polvrrhiza], lower side erhizinosc, but radiately lined. Colour 

 dark greyish-brown or brownish-black, greyish-white at the centre (wrinkles 

 greyish-white) + decolorated at the margin, lower side mauve at the centre, 

 otherwise dark to black. The black colour is due to a /uliginose priiina, 

 which is not, however, equally developed on the whole lower side. 



Upper cortex covered with an uncoloured, uneven stratum, 20 — 30 ;x thick, 

 upper cortex plectenchymatous, with perpendicular septate hyphae, reddish- 

 brown at the exterior parts (10 — 20 (j.), otherwise uncoloured. Gonidia in 

 a thin uncoherent stratum, at times protruding to the coloured part of the 

 cortex. Many gonidia in the papillose base of the fasciculate fibrillae, none 

 in the fibrillae themselves. Fibrillae minutely papillose on the surface. 



Medulla white, hyphae densely contexted. Lower cortex greyish or pale 

 greyish-brown, hyphae densely contexted and, as usual, + parallel to the 

 surface. Pruina formed of bundles of hyphae (50—70 [z long), originally 

 pale, but soon black, they are constrictedly septate, and the apical articulae 

 dehiscent. 



Apothecia and p3-cnides searched after in vain. 



React. Upper cortex somewhat decolorated by Ca Cl, O.,, otherwise the 

 whole thallus uncoloured by KOH as well as by Ca Cl., O., and KOH + 

 Ca CL O,. 



10. Gyrophora polyphylla (L.) Kbr. 



øst/. Hvaler: Kirkoen (B. L.), Sletter (B. L.). Akersh. Heland: Skulle- 

 rud (B. L.), Nordby (B. L.), Åker many stations (Moe and others), Bærum: 

 Kolsaas (Kiær). Fest/. Yasser (B. L.), Viksfjorden (B. L.), Fredriksvern 

 (Norm.). Busk. Drammen: Bragernesaasen (Somrft.), Hol: LidQell (B. L.), 

 Haugastøl (B. L.), Kongsberg (Kiær), Nore: Skjønne (Kiæ.r). 



Aiistagd. Lyngør (B. L.), \^egusdal: Kxikjon (SoR.), Evje (Sør.). Vest- 

 agd. Mandal: Skjernøen (B. L.l. 



Hard. Moster (H.l, Mogster (B. L.l, Thurø (B. L.), Lofthus (Lid), Gran- 

 vin: Skaalsæte (H.), Voss: Lønehorgje (B. L.), and Lid (B. L.). 



Hed. Tron (B. L.), Tonset (B. L.), Hosbjor (Jebe). Opl. Nævertjell 

 (B. L.), Vaagemo (B. L.l, Lom: Kjæstad (B. L.), and Ulstad (B. L.); Skjaak: 

 Grjotli (Jebe); Hadeland: Valbykampen (B. L.). 



Sortr. Dovre (Boeck), KongsvoU (Zett.). 



Nordl. Bodø (H.), Skjerstad (Somrft.), Lofoten (Barth), Melbo (Norm.). 

 Tronis. Gibostad (B. L.l; Maalselven: Mestervik (B. L.l, Bardo: Saarivuobnie 



Vid.-Selsk. Skr. 1. M.-N. Kl. 1921. No. 7. 7 



