67 
Arabis agit L., sand cress, p. 752 
; blero M. Hopk. 
A. missouriensis E. Greene, rock cress, Missouri rock cress, p. 756 
var. deamii (M. Hopk.) M. Hopk. 
var. missouriensis 
. shortii (Fern.) Gleason, p. 756 
var. phalacrocarpa (M. Hopk.) Steyerm. 
var. shortii 
> 
ARMORACIA 
Armoracia lacustris (A. Gray) Al-Shehbaz & V. Bates, lake cress 
S, M: A St gigs aac Wieg.] (Al-Shehbaz and 
Bates, 1987), p. 7 
+A. rusticana (Lam.) P. Sar ee Meyer & Scherb., horseradish, 
p. 747 
AUBRIETA 
*¢Aubrieta deltoidea (L.) DC. (Dunn, 1982) 
BARBAREA, winter cress 
¢Barbarea vulgaris R. Br., yellow rocket, common winter cress, 
. 761 
var. arcuata (Opiz ex J. S. Pres] & C. Presl) Fries 
var. vulgaris 
BERTEROA 
+Berteroa incana (L.) DC., hoary alyssum, p. 743 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
