Nemesia suaveolens K.E.Steiner

Annual herb up to 320 mm tall, simple or branching from base; stems glandular pilose, rectangular in cross section, corners ridged, sides up to 1.8 mm wide, lateral stems up to 160 mm long. Leaves simple, opposite, mostly sessile to shortly petiolate; lamina lanceolate to ovate or elliptical, 4-22 x 2-12 mm, sparsely glandular pilose, apex rounded to acute; base rounded to cuneate; margins entire to shallowly and sparsely dentate; petioles 0-12 mm long, glandular pilose. Flowers axillary or in lax, terminal racemes, pleasantly spicy scented; racemes up to 270 mm long; bracts alternate, sessile, cordate, reflexed, glandular pilose, lowermost leaf-like up to 12.5 x 8 mm, uppermost reduced to ± 3 x 3 mm, apex acute, base cordate; margins entire; pedicels 4-12 mm long, ascending, glandular pilose. Calyx lobes 5, lanceolate to ovate, acute, spreading, densely glandular pilose, central upper lobe lanceolate, 3.0-3.9 x 0.9-1.2 mm, upper lateral lobes lanceolate, 2.8-3.7 x 0.8-1.3 mm, lower lateral lobes ovate, 2.8-3.5 x 1.0-1.6 mm. Corolla bilabiate, 11.6-21.8 x 10.5-10.9 mm, upper lip 4-lobed, 2 inner lobes oblong to obovate, 6.4-6.7 x 2.6-3.1 mm, apices rounded to acute, bases strongly oblique, 2 outer lobes spreading to revolute, oblong, 3.1-5.1 x 3.2-4.1 mm, apices rounded to emarginate, bases strongly oblique; upper lip deep magenta at base (greyish magenta reverse) surrounding a bright golden yellow rectangular patch, 1.2-1.6 x 1.7-1.9 mm, just above corolla opening, becoming greyish white on lobes distally, lower lip widely obovate, 6.0-8.2 x 6-8 mm, apex emarginate, light yellow with yellowish white reverse, base with a raised palate; palate convex, oblong, cristate, 3.1-4.6 x 4.7-6.0 mm, divided by a central groove into 2 raised yellow bosses, bosses glabrous or with minute trichomes distally, densely pilose with conspicuous pale yellow or white trichomes basally around corolla opening; hypochile (floor of corolla tube) ± 3.9-4.1 mm long, central boss low, densely pilose, trichomes white to pale yellow; sides and upper inside surface of corolla tube greyish with magenta to purple lines, base of tube with a narrow spur, 3.5-4.8 x 0.7-0.8 mm, pale yellow to whitish, deflexed and ± straight or curving forward slightly in distal third, outside sparsely glandular pubescent, spur opening flanked by 2 greenish yellow to orange patches. Stamens 4, usually white, purple flecked distally, lying in a shallow depression (2.5-2.9 x 0.8-1.0 mm) in upper inside surface of corolla tube; filaments of anticous pair (twisted into posticous position) 2.7-2.8 mm long, sigmoid, ± straight in middle, glabrous or with a few glandular trichomes below middle; posticous filaments ± straight except at base, 0.8-1.0 mm long, glandular pubescent; anthers 0.9-1.0 mm long, each pair strongly coherent. Ovary oblong-ovoid, 1.2-1.6 x 1.0-1.6 mm, laterally compressed; style oblong, ± 0.8 mm long, compressed contrary to ovary, lying between anther pairs and curving slightly away from corolla opening; stigma crescent-shaped, 0.1 x 0.5 mm. Capsules ovate to oblong in outline, 3.9-10.6 x 3.6-6.5 mm, laterally compressed contrary to septum, apex emarginate to bilobed, lobes rounded. Seeds winged, ovate to widely ovate, ± 1.5 x 1.0-1.5 mm, light brown, verruculate, wing membranous with numerous parallel, brownish veins.