Diascia macrophylla Spreng.

Annual herb, main stem c. 10-600 mm long, 1-4 mm diam., occasionally simple, usually branching low down, weak, decumbent or ascending, glabrous or glandular-puberulous, glandular-puberulous on the inflorescence axes. Leaves in up to 7 pairs on each branch, c. 10-45 x 8-28 mm, ovate, apex acute to obtuse, base subcordate, margins subentire to sharply serrate, glabrous or with a few gland-tipped hairs on the lower margins and main veins below; petioles glandular-puberulous, up to 15 mm long, decreasing rapidly in length upwards, uppermost leaves subsessile. Flowers many, in long terminal racemes, simple or loosely panicled; lowermost bract leaf-like, up to c. 14 x 7 mm, upper ones becoming rapidly smaller, cordate-ovate, acuminate, glandular-puberulous; pedicels c. 15-30 mm long, filiform, glandular-puberulous, patent or deflexed, tip abruptly upcurved. Calyx segments lanceolate, acute, anticous pair 3 x 1.5-2 mm, three posticous ones slightly smaller, all glandular-puberulous. Corolla tube 4-5 mm long, invaginated then partly turned out again, two lateral spurs 10-13 mm long, straight, directed straight down, with dark sessile glands inside on one face; limb c. 14-20 x 14-17 mm, anticous lobe c. 7-11 x 7-1.5 mm, two lateral lobes 4.5-6 x 4-5 mm, two posticous lobes 4-5 x 2-3 mm, all lobes ± oblong, the posticous pair fused nearly to the apex, corolla “mauve”, “purplish-blue”, “pale blue”, “mauvy-blue”, “deep mauve”, rarely pink, glabrous outside, inside with two large patches of dark sessile glands laterally placed at the base of the anticous lobe, these glands also present at the upper lateral sinuses; “window” deltoid in outline, concave, with two lateral yellow patches themselves concave. Stamens projecting forward; filaments 3.25-4 mm long, glandular-puberulous, hairs sometimes sparse; anthers 0.5 mm long, cohering strongly. Ovary 1.5-2 x 1-1.5 mm, deltoid in outline; ovules many in each loculus, style 2.5 mm long, stigma capitate, lying between the anthers. Capsules 8-10 x 3-4 mm, narrowly elliptic; seeds 1 mm long, curved, ridged.