Heliotropium asperrimum

Erect perennial, 30–60 cm high; indumentum of mixed simple and glandular hairs. Leaves oblong to obovate, mostly 1.5–8.5 cm long, 4–16 mm wide, apex acute or obtuse, base cuneate, margins revolute and slightly undulate, both surfaces hispid; petiole short, indistinct. Inflorescences usually branched. Sepals ovate, 3–4 mm long, acute, connate at base, not elongating with age; corolla 3–4 mm long, throat glabrous, hairy outside, white with a yellow throat, tube c. twice as long as lobes; anthers acute, apices free; style c. 1.5 mm long, stigma 0.5–2 mm long, glabrous. Mericarps 3 or 4, falling at maturity, glabrous, rugulose, brown. Flowers Oct.–Apr.