862 THE AMERICAN NATURALIST [Vol. XL 



most of them being circumpolar, but a few only reachin|y eastern 

 Asia. I have divided these into four groups: — 



(1) Going above 12,500 feet, and not below 11,000 (10 



Carex incurva Lightf. Papaver radicatum Rottb. 



C. atrata L. Saxifraga cernua L. 



C. pyrenaica Wahl, Dryas odopetala L. 



C. rupestris All. Dasystephana romanzovii (Ledeb.) 



C. microglochin Wahl. Sagina vmilis; Fries. ^ 



(2) Going above 12,500, but also below 11,000 feet (15 



species) : — 



EIy?in hellardi (Ml) I eptasea finqdlarxs (W il 



(.arcx niqncan^i^ \ M( \ (IoVmi) Potenhlla mi ea 1, 



Jiinroidcs .spicatuin (L.). Sibbaldia procumbens L. 



Ilnifdw scrotum (L) Campanula uniflora L 



(3) Xot gomg alnnt 12 -)00 oi 1 1 000 feet (3 species) 



Botrychuun lunana il ) ( »>, , nn andra W Bi 



