Fic, 6. lants of serpentine and limestone. a, fire pink (Silene virgi- 
nica): b, Phlox subulata; c, Cerastinum arvense; d, Sisyrinchuon mucro- 
natum: ce, Dodecathcon Mcadta. 
d 
! } 
reat % 
Fic. 7. Plants of sandy places. a, trailing arbutus (pigaca repens) ; b, 
bearberry (Arctostaphylos Uva-ursi); c, Silene pennsylvanica; d, bird-foot 
violet (Mtola pedata); ec, yellow star-grass (Hypoxis hirsuta). 
