Manulea minor Diels

Annual herb, stems 1-c. 20 tufted from the base, c. 60-300 mm tall, erect, simple, minutely glandular-puberulous on upper part including inflorescence axis, hairs on lower part up to 0.2-0.3 mm long, mainly glandular, a few balloon-tipped, leafless. Leaves opposite, bases connate, crowded at base, blade c. 6-28 x 2.5-16 mm, oblanceolate, elliptic or ovate tapering to a flat petiolar part roughly length of blade, apex obtuse, margins subentire to serrate, both surfaces glandular-puberulous, hairs up to c. 0.3-0.4 mm long, occasional balloon-tipped hairs also present. Flowers many in long terminal racemes or narrow thyrses, either solitary or in 24-flowered cymules, solitary flowers and cymules often occurring together in one inflorescence. Bracts (lowermost) 1-3 x 0.5-0.8 mm, linear-lanceolate. Pedicels or peduncles (lowermost) c. 2.5-9 mm long, shorter upwards but all flowers with noticeable pedicels. Calyx obscurely bilabiate, tube 0.4-0.5 mm long, anticous lobes 2-2.6 x 0.6 mm, posticous lobes 1.75-2.5 x 0.5-0.6 mm, all lobes oblong-lanceolate, tips sometimes subspathulate, margins glandular-puberulous, hairs up to 0.1-0.2 mm long, sessile glistening glands as well. Corolla tube 3.5-4.5 x 0.75-1.1 mm in throat, cylindric, inflated near apex, limb ± bilabiate, 4.5-7 mm across lateral lobes, posticous lobes 1.5-2.2 x 1.75-2.2 mm, anticous lobe 1.75-2.8 x 1.3-2.1 mm, all lobes subrotund to elliptic-oblong, with rounded tips, white, yellow star-shaped patch around mouth and extending down tube, glabrous to minutely puberulous outside, glistening glands on backs of lobes, 4 longitudinal bands of clavate hairs in throat. Stamens 4, anticous anthers 0.25-0.4 mm long, just included, posticous anthers 0.6-0.8 mm long, included, posticous filaments bearded. Stigma 0.7-1.1 mm long, deeply included. Style 0.25-0.5 mm long. Ovary 1-1.2 x 0.6-0.7 mm. Capsules 3-3.5 x 1.5-2 mm. Seeds c. 0.5-0.6 x 0.3-0.4 mm, pallid.