Tuberous twining or not twining herbaceous glabrous perennial with lateral pseudo-umbels of 30mm yellow-green or pale grey-green flowers tinged purple on edges or striped or blotched red-brown, glabrous sepals 3mm long, curved corolla tube glabrous outside 25mm long purplish at base greenish above, 10mm lobes, purple with white basal blotch or yellowish-green, fused at tips, purple limb, hairy within, inner corona with 5 lobes, fruit twin follicles to 100mm long, tuberous roots, fleshy glabrous leaves 45mm x 5mm, tuberous root
Edible in every part, raw or stewed