Description: — Shrubs, terrestrial or epiphytic, sub-clambering, to c. 2.5 m; root-forming tuber present. Branchlets slender, c. 1.5 mm wide, with patent pubescence mixed with shorter and lax glandular hairs, glabrescent, older stages with prominent lenticels. Leaves: petiole 3 – 3.5 × 1.5 mm, pubescent; blades ovate-oblong, ovate-lanceolate or ellipticlanceolate, 4.8 – 11.8 × (1.8 –) 3.2 – 4.1 cm, base usually rounded or nearly so, often slightly oblique with one side shallowly cordate and the other rounded, less often broadly cuneate, extreme base slightly contracted and decurrent, margin entire, slightly revolute or planar, basal gland 1 per side, impressed, at 1 – 2 mm distance from the petiole, apex caudate-acuminate; midvein and lateral veins impressed above; lateral veins 3 – 4 on each side of midvein; reticulation distinct above, distinct to ± obscure beneath; pubescent on both surfaces, glabrescent except on major veins adaxially, pubescence persistent abaxially, mixed with minute glandular hairs. Inflorescence a secund raceme, solitary or in pairs, simultaneous or sequential, (1 –) 9 – 11 - flowered, rachis 1.2 – 4.3 cm long, with patent pubescence mixed with shorter glandular hairs; bracts ovate with long acuminate apex, 1.3 – 1.8 mm long; pedicels red when young, turning green, bright yellow and reddish at late fruiting stages, 5.0 – 7.3 mm long, with patent pubescence mixed with shorter glandular hairs (these more prevalent than on rachis); bracteoles borne on lower half of pedicel near either base or middle, ovate-deltoid, c. 1 mm long. Flowers 5 - merous. Calyx tube cup-shaped, c. 0.8 mm long, ± hairy, hairs 0.15 – 0.3 mm long, also with shorter glandular hairs; lobes red, deltoid, c. 1.3 mm long, sparsely pubescent outside, glabrous inside, apex acute. Corolla pale yellow, broadly urceolate, c. 4.5 × 4.5 mm, slightly 5 - angled with the ribs distinct when dry, outside with scattered hairs on ribs, otherwise glabrous, inside glabrous; lobes ovate-deltoid, c. 0.5 mm long, reflexed. Stamens 10, filaments c. 2 mm long, incurved at apex, pubescent throughout; anthers echinulate, broadly oblong, c. 0.8 mm long, tubule c. 1 mm long, dorsal appendages present, c. 0.5 mm long. Disk yellow, pubescent, hairs straight and as long those on calyx. Style white, cylindrical, c. 3.5 mm long. Fruit light green, turning yellow, dull, not shiny, cupular, 4.5 – 5.0 × c. 5.5 mm, base truncate, patently pubescent.
Sumber: Rigiolepis argentii (Ericaceae): a new species from Sulawesi, Indonesia