Monocarpic. Leaf solitary, up to 350 × 300 mm., usually more or less cordate at the base, shortly pilose on both surfaces, subsessile or with a short thick stalk. Inflorescences arising from top of stalk and base of midrib, one to several, floriferous with several flowers open at a time; peduncles shortly but densely pubescent; pedicels up to 25 mm.; bracts small, linear. Calyx divided to the base into 5 linear-lanceolate segments 2–5 mm. long. Corolla 30–50 mm.; medium violet on outside of tube and lobes and on inside of lobes, with a deep violet patch on the palate and behind that, typically, a well marked yellow bar; tube 25–30 × 4 mm., subcylindrical, somewhat deepened on the lower side above the middle, mouth wide open, almost circular; limb almost regular, upper lobes c. 4 × 7 mm.; inferior lip c. 11 mm. long, lateral lobes c. 4 × 7 mm., anterior c. 6 × 7 mm., more or less porrect. Stamens arising in middle third of tube; filaments 5 mm., thick, curved, glabrous; anther lobes 1.5 mm. Staminodes small. Ovary c. 20 mm. long, densely pubescent with short spreading hairs; style 10 mm., pubescent; stigma stomatomorphic. Capsule very slender, pubescent, up to 130 × 1 mm. Seeds 0.5–6 mm. long, reticulate.
