1. any of numerous low-growing cushion-forming plants of the genus Draba having rosette-forming leaves and terminal racemes of small flowers with scapose or leafy stems; fruit is a dehiscent oblong or linear silique;
WordNet (r) 3.0 (2006):
draba
n 1: any of numerous low-growing cushion-forming plants of the
genus Draba having rosette-forming leaves and terminal
racemes of small flowers with scapose or leafy stems; fruit
is a dehiscent oblong or linear silique