Phil. J. Sc. 1929. 40: 172, t.15, f.3, t.16, f.5–6.
WFO ID: wfo-0000399913
IPNI ID: urn:lsid:ipni.org:names:332783-1
Verified by:
Shrub to 1.5m. Twigs c.5mm in diameter, rounded, glabrous or sparsely scaly, with large flat fragile scales. Leaves spirally arranged with conspicuous, spherical buds in the upper axils. Blade 100–120 x 40–60mm, elliptic, apex sometimes shortly acuminate, broadly acute to obtuse; margin narrowly but distinctly revolute; base broadly tapering, occasionally rounded, glabrescent above at maturity; laxly and more persistently scaly beneath. Scales small, marginal zone irregularly lobed; centre weakly or not impressed. Mid-vein strong, raised above in the proximal ½, smooth distally, raised beneath throughout, as broad as the petiole proximally, gradually narrowed upwards; lateral veins 12–15 per side, at an acute angle, indistinctly anastomosing, prominent or barely distinct on both sides, reticulation mostly visible beneath only. Petiole 10–20 x 2.5–3mm, without a groove, scaly, somewhat flattened. Flower buds to 40 x 20mm, shortly ovoid, shortly pointed, pale yellowish-green, smooth with the bracts appressed. Bracts broadly ovate, glabrous except for minute, fragile scales on the margins. Inflorescence 4–7-flowered, in slightly open umbels. Pedicels 10–20 x c.2mm, expanded to c.5mm just below the calyx, glabrous to laxly scaly. Calyx 4–5mm in diameter, disc-like, margin thickened, wavy and faintly lobed, glabrous. Corolla 35–40 x 50–60mm, funnel-shaped, held horizontally to semi-erect, yellow, without scent; tube 20–22 x 9–11 x 24–30mm, glabrous on both sides; lobes 20–29 x 20–24mm, unequal, oval, reflexed to horizontal, overlapping to c.½. Stamens irregularly arranged, exserted 5–8mm, slightly dimorphic; filaments linear, glabrous, c.25mm; anthers 4 x 1mm, strongly incurved, yellow, oblong, base obtuse. Disc glabrous or with a few sparse hairs, deeply lobed. Ovary 7–10 x 3–5mm, sub-obovoid-cylindrical, glabrous or with a few scattered scales, abruptly contracted distally; style 13–17 x 1.25mm, glabrous; stigma 5mm in diameter, yellow, circular, thick and lobed. Fruit 25–45 x 6–9mm, fusiform. Seeds 6–7mm, without tails c.1.2mm, the longest tail 3.8mm.
Philippines, Luzon, Batangas Province, Lobo Mts; Camiguin Island, Mt Hibok-hibok, Misamis Oriental Province; Mt Halcon, Mindoro.
Epiphytic or terrestrial.
Argent, G. (2006) Rhododendrons of subgenus Vireya. RHS:London. Page:282