ERYSIMUM, wallflower 
Erysimum capitatum (Douglas ex Hook.) E. Greene, western 
i Kia p. 762 
ssp. capita 
+E. aber ei L., wormseed mustard, wormseed wallflower, 
762 
ssp. cheiranthoides 
+E. inconspicuum (S. Watson) MacMillan, smallflower wallflower, 
764 
+E. repaints L., bushy wallflower, treacle mustard, p. 764 
HESPERIS 
¢Hesperis matronalis L., dame’s rocket, p. 762 
IODANTHUS 
Iodanthus pinnatifidus Dichens) Steudel, purple rocket, violet 
rocket, p. 
LEAVENWORTHIA 
Leavenworthia uniflora (Michaux) Britton, p. 751 
LEPIDIUM, pepper grass 
¢Lepidium campestre (L.) R. Br., field cress, cow cress, field 
pper grass, p. 73 
L. densiflorum Schrader, pepper grass, green-flowered pepper 
grass, p. 738 
densiflorum 
*+L. latifolium L., perennial pepper grass, broad-leaved pepper 
ass (Henderson, 1980) 
+L. perfoliatum L., shield cress, perfoliate pepper grass, p. 738 
L. virginicum L., poor man’s pepper grass, pepper grass, Virginia 
pepper grass, p. 738 
var. virginicum 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
