Hedyotis cyanantha

Herbs annual, erect, branching below; root-stock stout, branching; stem 6-18 cm long, stiff, terete, setaceous. Leaves sessile, opposite or verticillate, 1-1.5 x 0.2 cm, linear, aristate at apex, coriaceous, punctate, rigid, revolute at margin, setaceous above and along midrib below; stipules 2-2.2 x 1-2 mm, white, membranous, with 3-4 bristles, 3-3.5 mm long. Inflorescence axillary or terminal capitate cymes with 3-4 flowers. Flowers sessile or shortly pedicelled, 4-5 mm long; pedicel up to 1 mm long, setaceous. Hypanthium globose, 0.7-1 mm long; calyx limb 0.5-1 mm long, setaceous; lobes 4, 1-1.5 x 0.1-0.12 mm, triangular-lanceolate, aristate at apex. Corolla 3-4 mm long, blue; tube 1-1.5 mm long, glabrous inside; lobes 4, 2.5-3 x 1 mm, lanceolate to linear-lanceolate, 3 nerved, minute puberulous inside, incurved at apex. Stamens 4, exserted, longer than corolla lobes; filaments 3-3.5 mm long, attached near sinus of corolla lobes, ciliate at base; anthers oblong, 0.5-0.8 mm long. Ovary 0.5-0.8 mm long, ovules many; style slender, 4-5 mm long; stigma bifid, 0.5-1 mm long, linear, feathery. Capsules globose or ovoid, 2-4 x 1.5-2 mm, notched at apex, subcoriaceous, ribbed, punctate setaceous, with rigid calyx teeth, loculicidal on crown only. Seeds 40-70, 0.1-0.15 mm, triangular, narrowly winged, reticulate, very often orbicular.

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