12 VEGETATION IN COLORADO-HOLM. [ ^ MOI VouTix; 



S. tarasacoides (Gr.) Gme. James Peak, 13,000 feet. 



S. Holmii Gme. (pi. 4, fig. 28). Frequent near snow banks, Mount Elbert, 12,000 feet. 



S. amplectens Gr. Rare: In crevices of rocks, Mount Massive, 12,000 feet. 



Cnicus eriocephalus Gr. Not uncommon: James Peak, 13,000 feet; on grassy slopes, Mount Massive; Mount Kelso, 



12,000 feet. 

 Traximon glaucum Nutt. Rare: Mount Massive, 12,000 feet. 



According to the enumeration given above 170 species of vascular plants were observed on 

 these mountains, in the Alpine region. Of these, 121 are dicotyledonous, 47 monocotyledonous, 

 1 belongs to the Gymnosperms and 1 to the Cryptogams. The largest family represented is the 

 Compositae with 24 species, then follow the Cyperaceae with 21, the Gramineae with 18, the 

 Caryophyllaceae with 13, the Scrophulariaceae with 10, the Rosaceae and Saxifragaceae each 

 with 7 species, etc. 



Some of these were also observed at lower elevations, and among those that appear to 

 belong more properly to the Spruce zone the following may be mentioned: Ranunculus adoneus, 

 Draba streptocarpa, Cardamine cordifolia, the 2 species of Arenaria, Potentilla fruticosa, Saxi- 

 fraga punctata, Antennaria rosea, Swertia perennis, Pedicularis Oroenlandica and Parryi, Betula 

 glandulosa, Zygadenus glaucus, Car ex j estiva, and Calamagrostis Canadensis. 



