Smithsonian Report, 1963. — Shetler 



Plate 9 



1. The white-flowered Arctic sandwort {Arenaria arctica Stev.), belonging to the chickweed 

 family (Caryophyllaceae), is a very showy species of arctic and alpine rock-deserts. 

 Above-ground vegetative parts are minimal. 



2. Mountain avens {Dryas octopetala L.), a dwarf mat-forming shrub (chamaephyte), is 

 one of the most widespread arctic-alpine species. A member of the rose family (Rosa- 

 ceae), it inhabits dry heaths, herbslopes, talus, barrens, etc., and has large showy white 

 flowers and almost no upright stems. 



