A diffuse herb, perhaps perennial, glabrous or nearly so, shining; stem compressedly quadrangular, with the narrower sides furrowed, 1 1/2 ft. long or more; branches divaricate, opposite, rather slender, wiry; internodes mostly shorter than the leaves; branchlets more or less flexuous, usually zigzag at the inflorescence; leaves opposite, spreading, lanceolate, acute or apiculate at the apex, broad or not much narrowed at the semi amplexicaul or subdecurrent sessile base, sharply denticulate, 1/5-1/2 in. long, 1/12-1/8 in. broad (lower leaves probably larger); racemes terminal, simple or divaricately branched, corymbose or elongated, usually zigzag, 1-6 in. long, bracteate; bracts alternate or the lower sometimes opposite, lanceolate or subulate, acute, entire or somewhat denticulate, smaller than the leaves, sessile; pedicels axillary to the bracts, 1/4-2/3 in. long, slender, minutely puberulous, spreading or ascending; calyx-segments lanceolate or sublinear, subacute, 3-5-nerved, minutely glandular-puberulous, entire, 1/12-1/8 in. long; corolla white, marked with violet lines outside, closed at the throat; upper lip 1/8 in. long, shortly 4-cleft, lobes rounded, 1/24 in. long; lower lip about 1/6 in. long, pubescent inside about the base; spur narrow, straight, 1/10 in. long; capsule semi-ellipsoid, unequal and slightly narrowed at the base, widened for a short distance towards the slightly horned apex, 1/5-2/5 in. long, 1/5-1/3 in. broad, top lines of the valves inclined at a very obtuse angle.
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