Iqbal et al. (2020) Evolvulus nummularius (L.) L. (Convolvulaceae): a new alien plant record for Pakistan
Plants stoloniferous perennial herbs with prostrate stems, rooting at the lower nodes; roots 2–4 cm long. Stems 15–40 cm long, usually brown-pilose, sometimes scabrous. Leaves usually alternate, sometimes distichous; petioles 4–6 mm long, brown-pilose; blades round to obovate, about 1–1.7 cm long and about 1.5 cm wide, margins entire, apices round, emarginate, veins of abaxial surfaces sparsely pubescent. Flowers axillary, 1–2 per leaf axil, pedicellate; pedicels sparsely pilose, 2–5 mm long, becoming reflexed in fruit; fruit. sepals 5, about 2 mm long and 1 mm wide, 2 outer, two inner, the fifth overlapping both; corollas white, united, deeply 5(–6)-lobed, about 5 mm across, tube about 2 mm long, 1 mm wide, lobes about 3 mm long, emarginate, opening at dawn, closing in strong sunlight; stamens 5, inserted on corolla tube; filaments about 4 mm long; ovaries 5-locular glabrous; styles 2-branched, branches subclavate. Fruits capsules, globose to ovoid, reflexed at matuiry, about 3 mm in diameter, with 2–4 seeds, initially purplish, becoming light brown at maturity; seeds ovoid, about 2 mm long and 1.5 mm wide, straw-colored with purplish spots.
Evolvulus nummularius is native from Mexico to Argentina, but it has become established in tropical and sub-tropical areas of Africa, Malaysia, Ceylon, Bhutan, India and Nepal, and (Iqbal et al. 2020) Pakistan.