Description

Key Characters:

Growth Form: Probably scandent or suffruticose vines.

Stems: Stems weakly 4–angled, densely hispid or rarely subglabrous.

Roots:

Leaves: Leaves simple. Opposite. Blades broadly ovate, 3.6–6.2 cm long, 1.7–4 cm wide. Apex acute. Base obtuse or truncate. Upper surfaces pubescent or occasionally glabrous; lower surfaces densely pubescent; blades membranous. Margins serrate. Petioles 6–19 mm long, densely to sparsely pubescent. Stipules absent.

Flowers: Flowers usually 6–8 per verticillaster, axillary, pedicels 4–8 mm long, densely to sparsely pubescent. Calyx bilabiate, campanulate, 4.5–8 mm long, enlarging in fruit, moderately to densely pubescent, the teeth barely acute, 1–2.5 mm long, 2.5–3 mm wide at base, splitting longitudinally, usually persistent or sometimes only ventral 1/2 persistent. Corolla bilabiate, apparently pale pink, very densely pubescent externally, glabrous within, tube narrowly funnelform, falcate, 16–29 mm long, upper lip 7–13 mm long entire or 2-lobed, flat or concave, lower lip 3–5 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; ovules 1 per ovary lobe, placentation basal-axile; style 1, exserted, arising between lobes, usually cleft, diverging after anther dehiscence, shortly 2-lobed, the lobes subulate; stigmas 2.

Fruit: Nutlets 6–7 mm long; 1-seeded; drupaceous; black at maturity; margins slightly winged; obliquely attached at base; included within calyx at maturity; exocarp fleshy; obovoid. Seeds with endosperm absent or scanty and oily.

Ploidy:

Habitat: Known only from the south slopes of Haleakalā; Maui.

Elevation Range: 900–1,200 m.