Glabrous, ephemeral herb, creeping or ascending, sometimes rooting at the lower nodes; branches mostly from the base, to 15 cm long, slender, flexuous; stems sometimes strongly angled, sometimes glandular, the glands dark brown, multicellular, peltate; roots mostly short and fibrous. Petioles very short or indistinct; blades ovate, obtuse at apex, cuneate at base, mostly 10-15 mm long, 8-10 mm wide, glandular-punctate on lower surface, the margins crenate in distal two-thirds of blade; major lateral veins usually 2 or 3 per side. Flowers solitary, seldom geminate, at first terminal, soon axillary, ca 8 mm long; pedicels slender, ca 3 mm long in flower, longer in fruit, the bracts basal, 2-4 mm long, linear, mostly entire; sepals free, the outer 3 ovate, 7 mm long and 2-3 mm wide, accrescent in fruit (becoming 9 mm long and 5 mm wide), acute at apex, obtuse or rounded at base, mostly eglandular, the inner 2 linear, slightly shorter than the outer ones; corolla tubular, exserted, yellow with purple lines, 5-8 mm long, bilabiate, the lobes rounded, sometimes irregularly crenulate, the upper lip reflexed, emarginate, the lower lip 3-lobed, scarcely reflexed, the throat bearded below the upper lip with clavate, unicellular trichomes; stamens 4, ca 3.5 mm long, held against one side of the tube beneath upper lip (a rudimentary staminodium sometimes present); filaments glabrous, inserted at unequal heights in the basal half of the tube, free ca 2 mm; thecae 2 per anther, oblong, held apart on. expanded connectives, the connectives consisting of a discoid or ellipsoid expansion at the filament apex and one slender arm to each theca; ovary narrowly ovoid, longitudinally sulcate; style 1.5 mm long, slightly curved, apically flattened; stigma a linear crest on the style. Capsules narrowly ovoid, ca 4 mm long, the walls stramineous, dehiscent loculicidally and septicidally from the apex, enclosed in accrescent calyx, the placenta enlarged, linear, persistent on the withered capsule; seeds numerous, ovoid, 0.3 mm long, longitudinally ridged with a reddish-brown reticulum. White 149.