Gunnera manicata, native to the Serra do Mar mountains of southeastern Brazil, is perhaps the largest species, with leaves typically 1.5-2 m (5-6 ft) wide, but exceptionally long, up to 3.4 m (11 ft), borne on thick, succulent leaf stalks (petioles) up to 2.5 m (8 ft) long.
One of the largest perennials you are ever likely to encounter, exceeded in size only by the closely related Gunnera manicata. The leaves can grow to over 2m (6.5ft) across on stems as long. The two species may seem hard to distinguish at times, but Gunnera tinctoria has distinctively red tinged...