Description

Key Characters:

Growth Form: Shrubby or possibly scandent.

Stems: Stems terete (cylindrical) or weakly 4–angled, glabrous or sparsely pubescent.

Roots:

Leaves: Leaves simple. Opposite. Blades broadly ovate, 1.5–3.9 cm long, 1.1–3.3 cm wide. Apex acute or subobtuse. Base truncate to cordate. Surfaces glabrous except pubescent on midrib of lower surface; blades membranous. Margins broadly crenate. Petioles 6–17 mm long, puberulent. Stipules absent.

Flowers: Flowers 2 per verticillaster, axillary, pedicels 2–4 mm long, puberulent. Calyx radially symmetrical, narrowly campanulate, 10–11 mm long, enlarging in fruit, subglabrous, the teeth lanceolate, 5–6 mm long, 1.5 mm wide at base, splitting longitudinally, usually persistent or sometimes only ventral 1/2 persistent. Corolla bilabiate, apparently pale purple or greenish, sparsely pubescent distally externally, glabrous within, tube narrowly funnelform, straight, 12–13 mm long, upper lip ca. 5 mm long, entire or 2-lobed, flat or concave, lower lip ca. 1.5 mm long, 3-lobed, the lobes flat or margins revolute, ovate, of similar size, distal portion of corolla sparsely to densely pubescent externally, the hairs simple or multicellular, occasionally glandular pubescent within, otherwise glabrous; nectary disk often present at base of ovary, annular or developed on anterior side only. Stamens 4, both pairs of similar length or upper pair slightly longer, included within corolla or well–exserted beyond upper lip; filaments inserted near throat, pubescent; anthers dithecal; anther sacs divaricate, opening by longitudinal slits. Ovary superior, 2-carpellate, each carpel longitudinally divided, placentation basal-axile; ovules 1 per ovary lobe; style 1, exserted, arising between lobes, usually cleft, diverging after anther dehiscence, shortly 2-lobed, the lobes subulate; stigmas 2.

Fruit: Fruit unknown. Seeds unknown.

Ploidy:

Habitat: Forests.

Elevation Range: