Streptanthella longistria (Wats.) Rydl. 6720 Caulanthus (2) Fls. pale yellow, leaves glaucous, as 6719 March 16 6721 Caulanthus cooperi (Wats.) Papp. fls. pale yellow with purplish brown stripes, calyx green or mauve, fls streptanthroid finds fixed at the base of barrea brushes, (8) 2 miles north of Mohave, Kern Co., Calif. March 17 no count 6722 Caulanthus lasiophyllus (H.+A.) Papp. Fls. white, plants variable depending on dryness of site, finds fixed at base of barrea bushes, (8) as 6721 n = 14 checked 6723 Tropidocarpum grave Hook. Fls. yellow, base of barrea shrubs, as 6721 (1) (only 3 plants found)