an annual herb, weak, decumbent or ascending, glabrous for the most part, slightly puberulous towards the top, slender, 1–2 ft. high, loosely branched below; branches ascending, or the lowest spreading, tetragonous; internodes 3/4–2 1/2 in. long; leaves opposite, ovate, obtuse or acutely and shortly acuminate at the apex, subcordate or subtruncate at the base, dentate or denticulate, membranous, green on both faces, 1/2–1 1/2 in. long, 3/8–1 1/5 in. broad; petioles short or ranging up to 3/4 in. long, narrowly decurrent; racemes terminal, elongating, 1 1/2–12 in. long, many-flowered; pedicels very slender, 1/4– 1/2 in. long or the upper shorter, patent, bent near the apex; bracts ovate-subulate, sessile, embracing the base of the pedicel, spreading or deflexed, 1/6– 1/5 in. long; calyx-segments lanceolate, acute, glabrous, 1/12– 1/10 in. long; corolla purple, about 1/3 in. broad; spurs 2, diverging, conical, acute, about 1/10 in. long; filaments slender, glabrous, all bearing anthers; capsule linear, glabrous, 1/2– 2/3 in. long by 1/24– 1/20 in. broad, mostly erect and subparallel, straight or somewhat curved. null
