310 THORODDSEN 



borealis, Alsine biflora, Cerastium trigynum, Saxifraga Hirculus 1 . In 

 Sydri Pol la r (729 metres) I collected in the same year the fol- 

 lowing plants: Equisetum variegatiim, E. aruense, Carex rigida, 

 C. lagopina, C. rariflora, C. pulla, Juncus arcticus, J. biglumis, Erio- 

 phorum Scheuchzeri, E. angustifolium, Poa alpina, P. flexuosa, Phleum 

 alpinum, Aira alpina, Festuca rubra var. arenaria, Calamagrostis stricta 

 L borealis, Salix glauca, S. lanata, S.herbacea, S. phylici folia , Betula 

 nana, Polygonum viviparum, Rumex acetosa, Arenaria ciliata, Cera- 

 stium alpinum, Silene acaulis, Cardamine pratensis, Tofteldia borealis, 

 Montia rivularis, Thalictrum alpinum, Pinguicula vulgaris, Armeria 

 maritima, Saxifraga decipiens, S. Hirculus, Pedicularis flammea, Eri- 

 geron uniflorus, Thymus serpyllum var. prostrata, Veronica alpina, 

 Dryas octopetala, Vaccinium uliginosum, Empetrum nigrum, Barfsia 

 alpina 2 . As already mentioned, on Tvidsegra there are extensive 

 stretches of bog-land and a considerable vegetation of various spe- 

 cies. In 1898 I collected here, near Ulfsvatn (453 metres), the fol- 

 lowing plants: Juncus biglumis, J.triglumis, J. tri/idus, Luzula 

 spicata, Eriophorum angustifolium, E. Scheuchzeri, Carex alpina, C. 

 atrata, C. dioeca, C. lagopina, C. pulla, C. rigida, C. sparsiflora, Aira 

 ccespitosa, A. flexuosa, Anthoxanthum odoratum, Festuca ovina, F. rubra, 

 Phleum alpinum, Poa alpina. P. glauca, Trisetum subspicatum, Coelo- 

 glossum viride, Salix glauca, S. herbacea, Polygonum viviparum, Alsine 

 verna, Cerastium alpinum, C. trigynum, Silene acaulis, Viscaria alpina, 

 Ranunculus acer, Thalictrum alpinum, Cardamine pratensis, Draba 

 incana, Geranium silvaticum, Saxifraga ccespitosa, S. Hircnlus, S. stel- 

 laris, Potentilla verna, Alchimilla vulgaris f. filicaulis, Sibbaldia pro- 

 bens, Vaccinium uliginosum, Bartsia alpina, Pinguicula vulgaris, Thy- 

 mus serpyllum var. prostrata, Gentiana nivalis, G. tenella, Galium sil- 

 vestre, Hieracium alpinum, Taraxacum Iwvigatum. In the same year I 

 collected near Hval vatn (378 metres) the following species: Juncus 

 triglumis, J. trifidus, Eriophorum angustifolium, Carex chordorrhiza, 

 C. dioeca, C. Goodenoughii, C. lagopina, C. pulla, C. rariflora, C. rigida, 

 Aira cwspitosa, A. flexuosa, Anthoxanthum odoratum, Festuca ovina, 

 Phleum alpinum, Poa glauca, Tofieldia borealis, Loiseleuria procumbens. 

 South of the great Jokulls the vegetation generally extends fur- 

 ther upwards on the plateau than to the north of them, but here 

 also there are vast deserts of gravel, lava and blown sand, with a 

 few widely separated oases, but it is especially the tracts between 



1 Determined by O. Gelert. 

 Determined bv O. Gelert. 



