Nebraska 7901 Erysimum asperum [Nutt.] DC: Ash Hollow grossy limestone knoll, edge of Ash Holle near U.S. Hwy 26, 5 miles southeast of Bewellen, Garden County Nebraska - May 19, 1979 35566.6 7902 Lesquerella arenosa (Richardson) Rydb. Stem several from base, outer a little decumbent; clay-like soil in a small ravine, near U.S. Hwy 26, 8 miles south east of Broadwater, Morrill County, May 19 35596.4 fixed Chorispora tenuella, Descurainia sophia and Thlaspi arvense cited along highway in Morrill County. 7903 Lesquerella ludoviciana (Nutt.) Wats. widely branching perennial, steep clay slope, hill south of Scotts Bluff, Scotts Bluff County fixed 1 n=10 ! Craig Greene