Description

Key Characters:

Growth Form: Vines, woody at base or caudex woody.

Stems:

Roots: Occasionally with adventitious roots.

Leaves: Leaves simple. Alternate, the lowermost opposite. Blades deltate to cordate. Margins dentate to crenate. Petioles twining. Stipules absent.

Flowers: Flowers solitary in the leaf axils. Flowers bisexual (perfect). Calyx urceolate or inflated and campanulate, 5-toothed, cleft to the base or slightly connate, the lobes narrowly to broadly ovate, subequal or dimorphic, in fruit often enlarging and becoming cartilaginous. Corolla red to violet, sometimes dark purple toward apex and whitish or pale violet toward base, strongly or weakly bilabiate, the throat open, glandular puberulent to glandular villous externally, lobes equal or unequal, the upper 2-lobes overlapping the lower ones in bud, recurved, the lower 3 projecting forward. Stamens 4, in 2 pairs or subequal, staminode of variable length. Ovary superior, cells 2, subequal; stigma 2-lobed.

Fruit: Capsules irregularly ovoid to globose; symmetrical to asymmetrical; irregularly dehiscent. Seeds brown; tuberculate or cristate and circumwinged.

Ploidy:

Habitat:

Elevation Range: