Plant: Annual herb; glabrate to pubescent, with a short, weak tap root Leaves: ovate, 6-16 cm long, 3-6 cm wide, the upper surfce glabrescent, the lower surface pubescent (usually along veins), acute, pinnately lobed, the lobes often toothed; base cuneate to subcordate; petioles sometimes as long as or longer than blade Flowers: with calyx 1.5-4 cm long, the teeth acute to acuminate, 2-6 mm long; corolla white, light violet to purple, the tube 3.8-7.7 cm long, the limb 1-2 cm wide, the acumens acuminate, 1-3 mm long Fruit: FRUITS erect, dehiscing along 4 sutures to base, green, ovoid to ellipsoid, 3-4.5 cm long, with 100-300 spines, the terminal spines 2-3.5 mm long, the other spines 0.5-1.5 mm long; pericarp glabrate to puberulent; persistent calyx base reflexed; SEEDS reniform to discoid, 3-4.5 mm long, 2.5-3.5 mm wide, rugose Misc: Roadsides and waste grounds; 1200-1850 m (4000-6000 ft); May-Oct REFERENCES: Bye, Robert. 2001. Solanaceae. JJ. Ariz. – Nev. Acad. Sci. Volume 33(1).