Herbs, annual, prostrate or semi-erect, to 0.7 m, glandular-viscid and often with attached grains of sand or dirt. Leaves ovate, acute, crenate-serrate, the bases obtuse, subtruncate or cordate, to 7 cm long and 2 cm wide, both surfaces sparingly villous but often viscid; petioles ca .1-2.5 cm long. Inflorescences cap-itula + loosely flowered, peduncles ca 1-2.5-cim long, the bracts lanceolate, sometimes lanceolate-ovate, ca 8-10 mm long, fimbriolate. Flowers sessile or with pedicels to ca 2 mm long; calyx campanulate, ca 6-8 mm long at maturity, per-sistent, 10-ribbed, pubescent, membranaceous, the teeth deltoid; corolla tubular, purple, ca 7-9 mm long, bilabiate, the upper lip 2-lobed, the lower 3-lobed, the lips weakly pubescent; filaments pubescent, the anthers ca 0.5 mm long; style slender, ca 2-4 mm long, the stigma 2-lobed, the one acute. Nutlets (3-)4, ca 2 mm long, pale brown.
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