“1G, 8. Plants of sand-barrens. a, three-toothed cinquefoil (Potentilla 
tridentata) ; b, blue-eyed grass (Sisyrinchiuum arenicola) ; c, Arenaria caro- 
liniana; d, Hudsonia cricoides; ec, ipecac spurge (Euphorbia [pecacuanhae). 
mC rain 
aN at ff fete 
Wash 
Fic. 9. Woodland plants, chiefly northern. a, twisted-stalk (Streptopus 
roscus); b, golden alexanders (Zisia aurea); c, bunchberry (Cornus cana- 
densis); d, goldthread (Coptis trifolta) ; e, Clintonta wmbellulata, 
—~ 
