ALPINE FLORA AND FERNS OF NORWAY. 311 



Common on Knudstie, Blaahoe, Fogstuhoe, Nystuhbe, &c. First 

 appears above the limit of the larger willows, and mounts up to 

 the extreme limit of the Phanerogami. 



P. FLEXUOSA, Wahlenberg. Occasional on Goutstifjeld, Blaa- 

 hoe, Knudshoe, and Nystuhbe. First appears at about the birch- 

 limit, and mounts above the limit of the larger willow tribe. 

 Found in company with Salix polaris on Goutstifjeld, and with 

 Campanula nniflora on Knudshoe. Professor Blytt is of opinion 

 that it is one and the same species with P. arctica found in Mel- 

 ville Island by R. Brown. A variety, P. flexuosa ft abbreviata, 

 is found in plenty on Blaahoe, Nystuhoe, and Knudshoe, always 

 above the limit of the larger willows. 



P. GLAUCA, Vahl. ; Fl. D. tab. 964. Common on low rocky 

 ground over the whole Fjeld. 



P. BALFOURII, Parnell. On the sunny side of the highest part 

 of Dovre e.g., on Blaahoe, Nystuhoe, Sneha3tten, and Knud- 

 shbe. 



P. ALPINA, L. ; Fl. D. tab. 807. Very general over the whole 

 Fjeld. Mounts above the birch-limit, but does not grow so high 

 up as P. FLEXUOSA or P. LAXA. A variety, /3 vivipara, is found 

 on Jerkinshoe and near Kongsvold. This plant varies much in 

 appearance according to the dryness or fertility of the locality 

 where it is found. Thus, in very dry places it assumes a dwarfish 

 growth, and has so great a resemblance to P. laxa /3 minor, as to 

 be readily mistaken for it. 



P. TRIVIALIS, L. ; Fl. D. tab. 1,685. Occasional in moist and 

 shady places below the birch-limit e. g., near Kongsvold, and 

 many places in Drivdal. 



P. PRATENSIS, L. ; FL D. tab. 1,444. 



/3. humilis. i The first is found on grassy places, nearly 



y. riyens. always below the birch-limit. $ on 



8. iantha. j dry places, by road-sides e. g., near 



f. anyustifdia. ] Jerkin and Kongsvold; y on dampish 



meadows. The variety which Professor Blytt has entered under 



the name of 8. iantha is found high up on the Fjeld, far above 



the birch-limit, on rather damp places ; e near Tofte, Jerkin, 



and in Drivdal. The Professor found two other varieties, of 



which the one he thinks may have been a luxuriant form of 



y. riyens. The other bore a great similarity to P. GLAUCA. Vahl. 



P. SCROTINA, Ehrh. ; Fl. D. tab. 2,166. In the lower parts of 

 Drivdal and Nystudal, in moist places. Not common. 



