66 HKRNT lyngp:. M.-N. Kl. 



consiclcis the tvvD fonnac to \n: two proper species. — I am quite unable 

 to find any decisive morphological difference between them. The case is 

 the same as with C7. coccifcra. A lens will frequently show soredia in 

 specimens which are corticate (f. ncgleda) to the naked eye, and a micro- 

 scope (low power, obj. 3) will turn out some soredia on almost every 

 podetium. 



Further imestigations a]r)ne can prove if the chemical difference, stated 

 by Zoi'F, is really constant, or if it is due to special causes (soil, exposure, 

 season, age). — I consider morphological differences to be of a much grea- 

 ter value than chemical ones, and as I can only find a morphological dif- 

 ference of degree between the iicglecta and the chlorophnca, I can only 

 consider them to be different formae of the same species. 



f. lu'ghxtn is supposed to prefer chalky substratum (Sandst. Clad. p. 

 443). 1 cannot confirm this statement for our country. 



CI. pvxidata *Pocillnui is a common plant throughout the whole country 

 on chalky and slaty substratum ; it is not missing on hard rocks. It is on 

 the whole a more alpine plant than negleda and chlorophaea, ascending to 

 15 — 1600 m. s. m., but it is not common at these elevations, and according 

 to Havaas it is not found on the western highest mountains. 



f. f. ncglccta and chlorophaea are equally frequent in our whole country 

 from the level of the sea to the tree line. 



They are found on moss}' rocks in open Pineta and Ericeta on the 

 coast, on stone fences, on naked earth, e. g. at way-sides, and on mossy 

 stones in the forest, occasionally at the base of old decayed stumps, a. s. o. 

 f chlorophaea is more a forest plant than f. neglvcta. 



It is generally stated that C. pyxidata is K-i-, but after some time f. 

 iicgh'Cta takes a pale rosa colour, owing to the presence of Tumarproto- 

 cetrar-Saure' (Sandst. in lit.). 



Numerous formae of less importance have been described, e. g. f f. 

 sfaphylca, simplex, and sytitheta, representing only stages of development, 

 referable to f neglecta as well as to f. chlorophaea. The podetia of either 

 form may be squamose or naked, smooth or longitudinally striate, wrinkled 

 or cracked, all of which variations have been named. In our country they 

 are of no interest from a geographical point of view. 



More conspicuous are. 



i) f [chlorophaea) proliféra: repeatedly proliferous from the margin and 

 from the centre of the scyphi (Saltdalen, Somrft.). Well separated from 

 CI. verticillata by the sorediate podetia. 



2) f {chlorophaea) hyalinclla with almost translucent podetia. There is 

 only one typical Norwegian specimen in the university herb., (Snarum, det. 

 Sandstede), podetia 3 — 4 cm., approaching to CI. finibriata, but Havaas 

 has also seen it in Hardanger (Granvin). 



