r92I. No. 7. STUDIES ox THE LICHEN FLORA OF NORWAY. 2ig 



ramosissimae, apice leviter incrassatae. Asci angusti, mt-nibrana apice incras- 

 sata. Sporae quaternae, sed saepe i — 3 solum e\'olutae, ovales, primo 

 achroae dein mox obscuratae, 25 — 34x17 — 23.7 a. 



Hymenium j dilute fugaciterque caerulescens, dein fla\o-fuscescens, 

 apices ascorum solum subpersistenter colorantur, hypothecium (verum) dilute 

 persistenter caerulescens. 



Thallus KOH = vel dilute tlavescens, Ca Cl, O., =, stratum gonidiale 

 KOH + Ca Cl., O., rubescens. 



The apothecia o[ A. ochrolciica and A. saniiciitosa agree so well with 

 those of A. ciiiciiiiiafa that tew, if any, microscopical specific characters can 

 be extracted from them. 



A. ocliro/ciica has larger apothecia than the other two (diam. up to 8 

 mm.), A. sannciitosa softer ones. 



The texture of the cortices (80 — 125 or even 200 \l], the hypothe- 

 cium (25 — 30 — 50 \j.\, and the hymenium (100 — 125 — 150 [x) agree well; 

 the hymenium is insperse in all species, and the conglutinate paraph3'ses 

 accordingly indistinct, most so in A. sanueiifosa. 



The normal number of spores is four, but usually a smaller number 

 only is developed, (one, two or three 1^ undeveloped and aborted spores are 

 often seen together with mature spores in the same ascus. In A. ciiiciniiata 

 they are soon coloured dark. 



The only apothecium seen of A. ciiiciiiiiata happilv contained many 

 mature spores, in A. oclirolcnca spores are quite rare, in A. sannciitosa more 

 common. 



Their size vary much: Normal mature spores are 28 — 33>-i6 — 20 [x 

 in A. oclirolcnca, but larger ones (sporae binae?) are also seen, up to 40-30 \j.. 

 In A. sannciitosa normal spores are 28 — 37~-i6 — 20 \j., but I have seen 

 spores up to 50x21 \x. Normal spores are thick-walled, and more than 

 half so thick as long, elongate spores are sometimes (rarely) fabaceous. 



The J reaction of the hymenium and the hypothecium \erum is more 

 intense in A. oclirolcnca than in A. ciiiciiiiiata, and almost persistently blue 

 in A. sarnieiitosa. 



The medulla of A. sannciitosa and A. ciiiciiiiiata takes a \-ery distinct 

 red colour by KOH + Ca CI, O.,, in A. oclirolcnca no such colour is per- 

 ceptible. In all species KOH dissolves a + intensely yellow substance. 



21. Ramalina Ach. 

 /. Ramalina fraxinea (L.i Ach. 



Ost/. Hvaler (B. L.I, Prestebakke (B.L.I, P>edrikssten (B. L.), Fredriks- 

 stad (B.L.I, Ovenøen (B. L.), Larkollen (B.L.I, Haabol (B. L.), Trogstad 

 (Chr. SoMRFT.), Jeloen (B. L.). Akcrsli. Ski (B. L.I, Drobak (B. L.), Kristi- 



