Plagiobothrys scouleri (Hook. & Arn.) I.M.Johnst.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - . Slender annual with several or many prostrate or ascending stems to 20 cm; lvs essentially all cauline, linear, to 6 cm × 5 mm, the lower 1–4 pairs opposite; stems terminating in an elongate, loosely fld false raceme or spike that may be irregularly bracteate below; cal 2–4 mm in fr; cor small, the limb mostly 1–2 mm wide; nutlets ovate or lance-ovate, 1.5–2.2 mm, usually roughened, with a small, basilateral scar; 2n=54. Widespread in w. U.S. and Can., casually intr. here and there in our range. May–Aug. Ours is var. penicillatus (Greene) Cronquist.