164 liKKNT LYNfiK. M.-X. Kl. 



J'(iniic/i<i rxasprratii/a prefers avenue trees of deciduous plants, it is 

 also found on fruit trees and shrubs, as Pynis and Rihrs, occasionally on 

 wood fences, and very rarely on rocks. I have not .seen it on Betitla, 

 otherwise it is not particular as to the choice of trees for its substratum. 

 Arnold saw it on road-side stones in Tyrol (Lieh. Ausfl. XXV, p. 360I, 

 and My\LMK on shady rocks near .Stockholm (.Stockh. bruna Farm. p. 119I. 



It is less sensitive to town smoke than most other lichens. 



Apothecia are rare in Norway as elsewhere, known in this country 

 only iVom 3 stations. 



Paniiclia vxasprrafiila was entirely overseen by former lichenologists 

 in our country. In reality this easily recognized species is one of the most 

 frequent Parnicliac in tiie zone of the deciduous trees. But its accurate 

 distribution is not yet quite clear. It is not known whether it is as com- 

 mon in Western as in Eastern Norway, and there are as yet relatively 

 few stations from the coast, but most probably it is common there. Its 

 northern limit is Prosta, north of Trondhjem (Drontheim), it will most 

 probably be found in the lowlands around the whole Trondhjem fjord. 

 Nordland is a terra incognita with respect to the petites espèces of lichens. It 

 has been looked for in yain north of Lofoten (Tromsø and Finmarken). On 

 the whole Pannclia cxaspcratula is a southern lowland species in Norway. 



There are only a few (saxicolous) specimens surpassing the tree line, 

 viz. from Dovre: Knutsho, 1000 m. s. m., and Granvin: Sellandstol. 



If the isidia are flat and broad, P. cxaspcratula approaches to P. laci- 

 niatiila (Flag.) (Harm. Lieh. Gall. rar. loi). According to Harmand (Lieh. 

 France p. 546) who studied the two species in nature the}' are well sepa- 

 rated. I have seen P. laciiiiatiila only once from Norway. 



29. Parmelia Icwiniatiila (Flag.). 



syn. Paruiclia lacvigatiila Parr. 



vide Lettau Beitr. z. Lieh. Thür. i Nachtrag p. 156. 



Vcstagd. Kristianssand: Ravnedalen (B. L.). 



Our plants agree entirely with Harmand Lieh. Gall. rar. loi, and with 

 Erichsen's from Haderslev in Slesvig. 



30. Parmelia incolorata (Parr.) Lettau. 

 vide Lettau Beitr. z. Lieh. Thür. i Nachtr. p. 157. 



Opl. Lorn: Ulstad, on slat}' rocks (B. L.). 



In 1909 I found these plants in Lom: They were first determined as 

 Parmelia fitligbiosa, they agree habitually quite well with this species, but 

 the reaction is C -i-. 



