Cardiospermum corindum L.

Annual herbaceous to slightly woody climber, 0.3–4.5 m. tall; stems deeply grooved, densely shortly pubescent.. Leaves stipulate, biternate or pinnate, triangular or ovate in outline, up to 9 cm. long, 10 cm. wide, mostly densely velvety pubescent, in biternate examples composed of 3 main divisions, the median larger than the laterals; petiole 0.3–2(–3) cm. long; first order petiolules 0.1–3 cm. long, second order petiolules 0–1 cm. long; terminal leaflet ovate, 1–5.2 cm. long, 0.5–4.5 cm. wide, acute to acuminate and apiculate at the apex, attenuate-decurrent to truncate or cordate at the base, crenate to serrate or deeply lobed.. Inflorescences corymbose to paniculate, the rhachis with 3–5, few-flowered corymbiform racemoid thyrses, grey-pubescent, or a paniculate thyrse 0.4–1.5 cm. long with 6–12 racemoid thyrses 0.2–1.1 cm. long; peduncle below tendrils (2–)3–12 cm. long, above 0.2–1.3 cm. long; secondary peduncles 0.2–1.4 cm. long; pedicels 2–4 mm. long.. Sepals unequal; outer broadly elliptic to ± round, 1.5–2 mm. long, 1.5 mm. wide, inner elliptic, 3–5.5 mm. long, 2–3 mm. wide.. Petals white or cream, elliptic, (3–)4–6 mm. long, 2–3.5 mm. wide; appendage orange.. Stamens 8, with filaments 3–4 mm. long, pilose.. Ovary 2–3 mm. long; style 0.5–1 mm. long; stigmas ± 0.5 mm. long.. Fruit green to orange or rusty red, ovoid or usually ellipsoid, (2–)2.5–3.5(–4) cm. long, (1.5–)2–3.3 cm. wide, finely velvety when young; septa elliptic, longer than wide.. Seeds black, 4.5–5 mm. diameter; hilum white, reniform or cordate, 3 mm. long, 3.5 mm. wide.