196 URRNT LYNf.K. M.-N. Kl, 



to C . /iiiiipiriiKi (S\iiM|)sis |). 302 and 312; I 11. I'Xiks considers the two 

 names to be syiionyiiia II, ich. Scand. p. 105I; I Iakmani» describes them as 

 two diHcrciit formac (Licli. I'lancc |>. 590I, bul die (\\\\'(V(.:ncL is not easily 

 seen Iikiii his descri[)ti<)ii. 



In my opinion it is impossible to maintain any distinction between 

 them. Some specimens have a thin thalhis with Hat or even concave laci- 

 niae, others thickei' or even inflate laciniae, the inciseness of the thallus 

 also varies very much and, accoi-ding-ly, the breadth of the laciniae. 



Pycnides are not by far so well developed in the variety as in the 

 type, but they are rarely missing, and sometimes very numerous. 



The predominating colour is a citrine yellow, but it is more or less 

 marbled with a faint green; the colour becomes darker with the dexelop- 

 ment of the green spots. It is generally stated (Nylander, Harmand) that 

 the type has a darker upper face and a relatively paler lower face, whereas 

 the two faces should be of almost the same colour in the \ariety. There 

 is no such difference seen in Norwegian specimens, var. tcrrcslris has quite 

 as frequently a darker upper face as the type. 



If the thallus is thick and rigid, it is often cracked. 



var. tcrrestris is common on earth in alpine positions, especially on 

 schistose substratum. It was neglected by former collectors, as M. N. Blytt 

 and MoE, its distribution is therefore insufficiently known, and the following 

 few stations give no adequate idea of its distribution in Norway: 



Sont It cm Higlilaiuis: Haugastol (B. L.), Finse (B. L.), \'aage: Graahe 

 (B. L.), Dovre (Boeck a. o.): Harbakken (Th. Fr.), Hogsnydda (Th. Fr.), and 

 Knutshø (Th. Fr.), Sundalen: Laagtunga (H.). 



Northern Norivay. Saltdalen (Somrft., s. n. Cetraria Jniiiperiiia \-ar. 

 a/pi/ia), Baatfjell (Norm.), Maalselven: Isdalstind (Norm.). 



f. virescens Tuck. 



Cetraria juiiiperiiia ji. l'iresce/is Tuck. Syn. p. 17 (not seen). Tucker- 

 man Lieh. Amer. Septr. No. 8. 



At Ulleberg and Tronsrud near Larvik Norman found a lichen, which 

 he identified with the above (his specimens are distributed in Arnold 

 Lieh, exsic. No. 12 13. The thallus is yellownsh-green with a strong tinge 

 ot grey. — Analogous forms of Xaiiflii)>-ia parictiiia are also found along 

 our south and west coast. 



/3. Cetraria lacunosa. 



f. norvegica now f. 



Map. M, 5. 



Diftert a speciminibus americanis laciniis margine magis adscendentibus, 



latioribus et minus incisis, rotundatis, integris vel crenatis vel leviter crenato- 



