Diamond Burbark

rhomboidea: rhomboid or more or less diamond-shaped, referring to the leaves.

Usually annual or rarely perennial herb, up to 2 m tall but usually shorter. Leaves ovate to ovate-lanceolate, unlobed to distinctly 3 lobed, 2.5 - 15 cm long, 3-7 veined from the base; apex acute; base cordate or truncate; margin irregularly serrate. Flowers in axillary cymes, yellow. Sepals c. 5 mm long, often tipped dark red, linear, narrower and longer than the petals. Fruit spherical, tomentose, 4-5 mm in diameter including the short bristles or aculei.

Pan-tropical and subtropical, including South Africa.