Annual; stems glabrous, procumbent, ascending or erect, not rooting at nodes. Lvs glabrous; petioles c. 5-30 mm long; leaflets obovate or obtriangular, acute, obtuse or slightly emarginate, mucronate, cuneate at base, finely serrate, c. 5-25 mm long; lateral veins slightly recurved or straight and slightly thickened toward leaflet margin; petiolules up to 1 mm long, ± equal; stipules ovate-oblong, acuminate. Infls axillary, racemose or umbellate, globose, pedunculate, ± = or somewhat > lvs; fls resupinate, numerous, rarely as few as 6 and umbellate, subsessile; bracts subtending fls much reduced, connate at infl. base. Calyx tomentose on upper side, moderately hairy when inflated, with c. 20 indistinct veins, greatly inflated on upper side at fruiting; throat open, ± glabrous; calyx teeth ± equal at flowering, erect at fruiting, < corolla; upper 2 teeth narrowly triangular, ± = tube, conspicuous on the inflated calyx; lower 3 teeth triangular; sinuses acute or obtuse. Corolla pink to reddish purple, persistent but ± enclosed by inflated calyx at fruiting, (4)-5-7 mm long. Pod glabrous, straight, < calyx, 2-3 mm long, 1-2-seeded; seeds c. 1-1.5 mm diam.
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Ascending or decumbent annual; peduncles 2–5 cm; cal at maturity resembling that of no. 7 [Trifolium fragiferum L.]; cor inverted, the standard toward the lower side of the head; 2n=16. Native of Europe, intr. in grass-seed and established at widely scattered stations in our range. Early summer.
An annual herb. It can lie over or be erect. The leaves have leaflets. The leaflets are 7-30 mm long. They are broadly wedge shaped. The flower are in a head on a stalk. It is pink or reddish-purple. The fruit are a short oval shape. It is inflated.
Found mostly on heavy soils, growing on fallows and in natural grazing, on roadsides and waste ground. Roadsides, in fields, waste places, humid grassy plains and lower mountains; at elevations from sea level to 1,500 metres.
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It is a temperate plant. In Argentina it grows below 500 m above sea level.
Can be grown by seedlings. Seeds needs soaking.
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