An erect herb, annual, slender, glaucescent, simple or nearly so, glabrous below, sparingly glandular-pilose above, 6-10 in. high; stem slender, tetragonous, furrowed; internodes mostly longer than the leaves; leaves opposite, oblong-lanceolate or sublinear or the lower oval, obtuse or rounded at the apex, nearly rounded at the base, membranous, glabrous, distantly denticulate or very nearly entire, sessile or subsessile or the lower shortly petiolate, 3/4-1 1/4 in. long, 1/20-2/5 in. broad; racemes terminal, few-flowered, lax; bracts lanceolate-linear, alternate, subentire, smaller than the leaves; common peduncle 1-3 in. long, slender; pedicels axillary to the bracts, very slender, thinly glandular-pilose, 1/3-3/4 in. long; calyx-segments linear-elliptic, obtuse or nearly so, glandular-puberulous, 1/8-1/6 in. long; corolla glabrous, pallid, about 1/2 in. long; upper lip 1/3-3/8 in. long; lobes oblong, rounded at the apex, about 1/4 in. long and 1/8-1/6 in. broad; lower lip rounded and emarginate at the apex, about as long as the upper; palate glabrous; spur conical-prolonged, straight, 1/8-1/6 in. long, obtuse or scarcely acute.
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