The leaves are spirally arranged,
exstipulate, with a short petiole to 3 mm in length; the leaf blade is narrowlyelliptic, to 10 x 2.5 cm, with a cuneate base that runs decurrent almost to the base of the petiole, glabrous on both sides but the upper side warty, margin slightly undulate, venation pinnately veined, midvein impressed above, prominent below, secondary veins 10-12 ascending pairs, tertiary veins obscurely reticulate, apex obtuse to acute.
Leaf simple opposite, decussate, cauline,
exstipulate, petiole short, flattened, glabrous, pulvinous to sheathing base Flower bisexual, typically zygomorphic, complete, erect, sessile, hypogynous.
Leaves alternate to rosulate, stipulate to
exstipulate; petiolate, rarely sessile; blades elliptic to suborbicular-cordate, palmately veined, rarely pinnately veined, margin entire to lobate, glabrous to pubescent.
