Technical Abstract: Lesquerella (Brassicaceae) collecting explorations remain paramount in getting diverse germplasm for continuing efforts in developing promising new crop varieties. Exploration activities in Southwestern states were conducted in April to June 2010 to obtain seeds from wild populations of two species in the genus and gather samples for testing differences in seed dormancy among populations and plant sizes. A total of 28 sites of L. fendleri and L. gordonii were visited in Arizona, New Mexico, and Texas. Seven of the 28 sites are near or at previous collection sites sampled in the mid-1990’s, while 21 are considered as new sites. Bulk seed samples were obtained from 10-50 plants in each site as well as seed samples from 8-20 individual plants classified as either normal or small-sized. Ongoing experiments to determine the effects of salt treatments (LiCl and MgCl2) during afterripening at various temperatures (5, 25, and 35oC) and different storage durations (4, 6, 12 weeks) are still in the first month. The differences between sites, plant size, and species based on samples subjected to the enumerated treatments will be studied and reported subsequently.