Jamesbrittenia pedunculosa (Benth.) Hilliard

Annual herb, stems up to c. 45-400 mm long, up to 0.25 mm diam. at base, well branched from base and above, sprawling, glandular-pubescent, hairs up to 0.5-1.4 mm long, some coarse and up to 0.1-0.2 mm across flattened base, leafy. Leaves opposite near base, soon alternate upwards, up to 10-50 x 10-25 mm, ovate in outline abruptly contracted to a petiolar part accounting for up to half total leaf-length, apex ± acute, margins irregularly and coarsely lobed and toothed (cut up to 1/2-3/4 of way to midrib), both surfaces glandular-pubescent, hairs up to 0.2-1.4 mm long, longest on petiolar part, scattered glistening glands as well. Flowers solitary in all the leaf axils. Pedicels up to 34-80 mm long, almost filiform, glandular-pubescent, hairs up to 0.2-0.25 mm long, some stout. Calyx tube 0.1-0.25 mm long, lobes 2.3-4 x 0.6-1.1 mm, narrowly rhomboid, ± acute, glandular-pubescent, hairs up to 0.1-0.2 mm long, glistening glands as well. Corolla tube c. 4-7.5 x 2.5-3.5 mm in throat, cylindric then abruptly campanulate in upper half, limb distinctly bilabiate, c. 8-11 mm across lateral lobes, posticous lobes 3-6 x 2.5-5 mm, base of posticous lip shallowly cucullate, anticous lobe 2-4 x 2.4-3.6 mm, all lobes subrotund, minutely glandular-puberulous outside, band of clavate hairs inside throat, extending briefly onto base of anticous lip and there c. 0.75-lmm long, ± acute, lobes bright yellow, sometimes with a dark purplish patch at base of posticous lip, always with a big dark patch on posticous side of tube, often with 2 small dark outgrowths on upper margin of patch about level with top of anticous anthers. Stamens: posticous filaments c. 1-1.2 mm long, minutely glandular above point of insertion, anthers 0.5-0.9 mm long, anticous filaments 0.4-0.6 mm long, anthers 0.3-0.7 mm long, visible in mouth. Stigma c. 0.2 mm long. Style 3-5.8 mm. Ovary 1.2-1.5 x 0.7-0.8 mm. Capsule 3-6.5 x 2.5-4 mm, glandular-puberulous, glistening glands on sutures. Seeds 0.7-1 x 0.3-0.4 mm, reticulate, eventually patterned with transversely elongated pits arranged in chequer-board fashion.