1 92 1. Xo. 7. STUDIES ON THE LICHEN FLORA OF NORWAY. 233 



C'siira /oi/gissi/iia has a limited distribution in Xorwav : in S. E. low- 

 land and lower subalpine forests. In places it is quite abundant. 



As might be expected from its habitus C /oi/gissinia has a thick axis: 



Thallus diam 375 jx 310 — 440 a 400 — 500 [j. 



Axis 200 160 — 180 210 — 240 



Cortex thick 45—50 50 — 80 40 — 65 



Medulla „ 35 — 40 25—50 50 — 60 



The axis is ca. half as thick as the somewhat compressed thal- 

 lus. — The medulla varies from almost wanting to densely contexted or 

 even compact. 



The tibrillae are quite filled up with gonidia, thev must be important 

 assimilating organs. 



Chem. react. Axis first blue then sordid vinous red with j. Zinc 

 chloriodide isolates the axillar}' hyphae of the fibrillae, but not in the main 

 stem. No colouring with KOH. 



Thin tangent, sections of the fibrillae show the apical points of the 

 cortical hyphae arranged in very regular spiral lines (KOH, aq., J.I. 



23. Thamnolia Ach. 

 /. Thamnolia vermicularis (Sw.i Ach. 



Busk. Haugastol (B. L. ). 



TeletJi. Gausta (Th. Fr.I. 



Hard. Siggen (H.l, Xesheimshorgje IH.I, Hardangervidda: Graoberg 

 (H.I, summit of Haarteignuten (H.l. Sogn. Common the mountains (H.l. 

 More. Sundalen: Hafsaas (H.l. 



Hcd. Tron IB. L.I. Opl. \'aage: Graaho (B. L.I, Lom: 'infra niveam 

 aeternam' (Norm.), Fossæter (B. L.I, and Roisheim (B. L.I; \'ang: Oilo (Norm. I, 

 Bitihorn (M. N. Bl.I. 



Sortr. Dovre (M. N. Bl. 1824 et 1825I, Kongsvoll (Th. Fr.I, Knutsho 

 iTh. Fr.I, Hogsnydda (Th. Fr.I, X'aarstien (B. L.I, Drivstuen (B. L.I; Sne- 



hætta, common (Linds. I. 



# 



Nordl. Alstenoen (M. N. Bl.I, Saltdalen (Somrft. I, Steigen: Prestkontind 

 (Norm. I, Hadseloen (Norm. I. Tronis. Tranø: MiddagsQell (Norm.), Bardo: 

 Innset (B.L.I, and Altevand (B.L.I, Maalselven: Frihetsli (Norm.), Tromso 

 (Norm. I, Floitjell (Norm. I, Mikkelvik (B. L.l, Lyngseidet (B. L.l. F/>//;/. Alten : 

 Kaatjord (Th. Fr.I, Tverelvdalen (Norm.), Store Raipas (B. L.), and Rautas- 

 varre (B. L.l; Maas© (Norm.); Porsanger: Skoganvarre (B. L.l; Laksetjor- 

 den: Nordkyn (B. L.); Tana: Berlevaag (B. L.), and Seida (Th. Fr.I; Varanger: 

 Mortensnes (Th. Fr.I, Styrene (Th. Fr.), Jakobselv (Norm.), and Havning- 

 berg (Norm.). 



