Diascia cuneata E.Mey. ex Benth.

Annual herb, glabrous, simple or branching from the base. Leaves many in a basal rosette, simple, lamina ovate or elliptic to obovate, 6-35 mm long, apex rounded to acute, base attenuate, margins repand, sinuate or irregularly cleft, rarely entire, lobes up to 3 mm long, deltoid to ovate, entire, apices rounded to acute and often with a minute white callosity, petioles up to ca. 20 mm long. Flowers borne on a central branch-like open lax raceme or on lateral racemes arising from the leaf axils, racemes up to 310 mm long, erect or decumbent, peduncles four-sided, up to 1.5 mm on a side, flowers arising in the axils of leaf-like bracts, one or two open flowers per raceme, unscented, nodding in early bud, bracts subopposite or alternate, becoming reduced upwards; pedicels 9-22 (-24) mm long, ascending, broadened and dorsi-ventrally flattened especially where attached to the flower, recurving in fruit. Calyx lobes five, three upper lobes ca. 2.7-3.0 x 0.8-1.0, lanceolate, acute, lower two lobes slightly shorter and broader, ca. 2.2-2.6 x 1.0-1.3 mm, ovate, all lobes acute and scaberulous on inner margins, spreading or somewhat reflexed. Corolla bilabiate, ca. 6.5-10.0 x 7.1-10.7 mm; upper lobes ca. 2.6-3.1 x 2.4-3.3 mm, widely ovate, rounded, bases oblique; lateral lobes ca. 2.6-3.8 x 2.4-4.1 mm, oblong to widely ovate, rounded to retuse, bases slightly oblique; lower lobe ca. 2.6-3.3 x 2.4-4.3 mm, broadly obovate, emarginate, often bearing two patches of purple glandular trichomes at the base; all lobes yellow, often with a violet to purple base; tube ca. 0.5-0.7 mm long, anticous portion purple or greenish yellow, posticous portion bright greenish yellow, often bisected by a purplish-red line or wedge from below the sinus of the upper lobes to the top of the boss bearing the stamens, corolla tube usually with a slight to moderate depression or sac at the base of each upper corolla lobe, sac up to ca. 1.0 x 0.8 mm when viewed from back of corolla lobes, oblong or oblong-ovate in outline, yellow, sometimes containing a small cluster of yellowish or purple clavate trichomes at the entrance of the sac on the side nearest the lateral lobe; tube with a central boss ca. 0.5-0.7 mm high bearing the stamens, posticous half of boss bright yellow except where bisected by purplish-red line, anterior half of boss greenish-yellow or reddish-purple. Stamens four, projecting forwards, anticous filaments ca. 2.0-2.5 mm long, curved at the base, glabrous to densely villous with whitish to reddish-purple trichomes; posticous (appearing to be anticous) filaments 1.9-2.4 mm long, nearly straight, sparsely villous, both filaments whitish to purplish; anthers ca. 0.5-0.7 mm long, strongly cohering, yellow. Ovary ca. 1.4-1.5 x 0.80-0.95 mm, oblong-ovate in outline, green, sometimes with a reddish-purple band at the middle, style ca. 1.1-1.5 mm long, more or less straight, stigma capitate, surrounded by anthers, ovules ca. 65-90. Capsule ca. 6.0-7.5 x 3.0-4.0 mm, falciform-ovate in outline, more than twice as long as the calyx at maturity, seeds ca. 1.1-1.3 mm long, brown, reticulate, embryo straight.