Hypericum drummondii (Grev. & Hook.) Torr. & A.Gray

Much-branched annual 2–8 dm, the branches usually alternate; lvs numerous, erect or ascending, linear, 5–20 mm; fls mostly solitary in the axils, short-pediceled; sep lance-linear, 3–6 mm, often surpassing the 3–5 mm pet; stamens 10–22; styles 3, to 1 mm; fr ovoid, 4–6 mm; seeds light to dark brown, 1 mm, coarsely and conspicuously rugose and areolate; 2n=24. Dry soil; Md. to O., Ill., Io., and se. Kans., s. to Fla. and Tex. July–Sept. (Sarothra d.)