ALPINE FLORA AND FERNS OF NORWAY. 303 



Common over the whole Fjeld ; form of leaf varies as in 

 S. glauca. 



S. MYRSINITES, L. ; Fl. D. tab. 1,054. Common. Not found 

 quite so high up as the last. Flowers early. Not so variable as 

 the last. The leaves of this species found on the Dovre are 

 shorter and thicker than in the sub-alpine specimens. 



S. OVATA, Seringe. Rare by Fogsaa above Fogstuen ; plentiful 

 in NystudaL 



S. RETICULATA, L. ; FL D. tab. 212. Common up to and 

 above the birch-limit. 



S. HERBACEA, L. ; Fl. D. tab. 117. Common from the fir- 

 limit up to the permanent snow. 



S. POLARIS, WahL Rare. First shows itself above the birch- 

 limit. Found in small quantities near Jerkin on Gederyggen, on 

 Volaso-fjeld ; more plentiful on Blaahoe, Gontsti-fjeld, and Knud- 

 shoe. It mounts up to the permanent snow, and appears to 

 nourish.best above the limit of the larger willows. 



CONIFERS. 



JOTIPERUS COMMTJNIS, L. ; Fl. D. tab. 1,119. Mounts high 

 above the birch-limit ; at its greatest altitude the leaves are very 

 short. The whole shrub is frequently covered with a bluish- 

 green dew that gives it a remarkable appearance. 



PINUS SYLVESTRIS. Reaches its highest limit between Dom- 

 baas and Fogstuen, and is not met with again before coming to 

 Jerkin, where it covers the bottom of the valley in the direction 

 of Foldal. 



PINUS ABIES. Is not found on Dovre ; but in the neighbour- 

 ing heights of Vaage it reaches nearly the same altitude as the 

 last 



ALISMACE.E. 



TRIQLOCHIN PALUSTRE, L. ; Fl. D. tab. 490. Common up to 

 and a little above the birch-limit. 



POTAME.i:. 



POTAMOGETON PALusTRis, L. ; Fl. U. tab. 222 (?) Found in 

 Volaso. 



P. PUSILLUS, L. ; Fl. D. tab. 1,451. Near Kongsvdd, and in 

 Volaso. 



P. NATANS, L. ; Fl. D. tab. 1,025. In Hviddal lakes. 



