Nemesia hemiptera K.E.Steiner

Annual herb up to 310 mm tall; stems rectangular in cross section, comers ridged, sides up to 0.9 mm wide, minutely glandular pilose, lateral stems up to 250 mm long. Leaves simple, opposite, sessile to shortly petiolate; petioles up to 6 mm long, glandular pilose; lamina ovate to lanceolate, 8-21 x 2-8 mm, subglabrous to sparsely glandular puberulous, base rounded to cuneate; apex rounded to acute; margins entire to shallowly dentate. Flowers axillary or in lax terminal racemes, racemes up to 225 mm long; bracts alternate, sessile, lanceolate, lowermost leaf-like, uppermost linear, reduced to ±2 x 0.3 mm, base truncate, apex acute; margin entire, glandular pubescent; pedicels ±5-14 mm long, glandular pubescent. Calyx 5-lobed, spreading, central upper lobe ±2.6-2.8 x 0.6 mm, lateral upper lobes ±2.6 x 0.5-0.7 mm, lower two lobes ±2.2 x 0.6-0.8 mm, all lobes narrowly lanceolate, acute, glandular pilose. Corolla bilabiate, 6.2-9.6 x 6.7-9.1 mm, upper lip four-lobed, two upper lobes oblong to ovate, 3.2-3.7 x 1.2-2.5 mm, base ± perpendicular to margins, apex rounded to emarginate, two lateral lobes oblong to elliptic, 3.3-4.4 x 3.1-3.3 mm, base strongly oblique, apex rounded to emarginate; lobes white except for a brown rectangular nectar guide, ±0.5 x 0.7 mm, below sinus of upper two lobes; lower lip with one lobe, widely obovate and emarginate or obcordate, 3.6-5.7 x 5.0-5.8 mm, white, tube below lip strongly inflated into a convex palate; palate ±2.1 x 2.8 mm, white, with dense patch of capitate, non-glandular trichomes at base of palate near corolla opening, hypochile ±2.4 mm long with a raised central ridge, densely pubescent with clavate trichomes; trichomes on distal 2/3 of ridge brown, remainder white, base of hypochile drawn out into a short nib-like spur, 0.5-0.8 mm long, entrance to spur flanked by three brown spots visible on outside of corolla around base of spur; inside of corolla tube white with lilac tinge. Stamens 4, whitish, lying in a shallow depression in upper surface of corolla tube; filaments of anticous pair (twisted into posticous position) ±1.6 mm long, ± straight except at base, glabrous; posticous filaments ±0.4 mm long, ± straight except at base, glandular pubescent; anthers 0.4-0.5 mm long, each pair strongly coherent. Ovary widely ovate in outline, 0.6-0.7 x 0.6-0.7 mm, laterally compressed; style ±0.3-0.4 mm, compressed contrary to ovary, apex wider than base, lying between anther pairs, slightly deflexed, stigma a crescent-shaped apical band. Capsules ovate to oblong in outline, ±3.4-4.6 x 3.5-4.5 mm, laterally compressed contrary to septum, apex emarginate to bilobed, lobes acute. Seeds ovate, ±1.3-2.0 x 0.7-1.0 mm, verruculate, winged on one side only, wing membranous, pale brown with numerous parallel veins.