Rhododendron revolutum Sleumer

Reinwardtia 1960. 5: 74.

WFO ID: wfo-0000405497

IPNI ID: urn:lsid:ipni.org:names:333219-1

Verified by:

Description

Low shrub to 40cm. Twigs c.1.5mm in diameter, rounded, the tips densely stellate-scaly and rough; internodes 1–4cm. Leaves 4–6 together in pseudowhorls at the upper 2–3 nodes. Blade 10–14 x 4–7mm, narrowly ovate; apex shortly acuminate, sub-acute; margin very strongly revolute, often to the mid-vein when dry; base truncate-rounded; densely brown-scaly on both sides, initially early glabrescent and rough above, scaly for longer beneath. Scales irregularly and deeply stellately divided, the minute centre extended downwards into a stem-like foot, each scale on top of a thick persistent epidermal tubercle. Mid-vein very slightly impressed above, obscure beneath as are the lateral veins. Petiole 0.5–1mm, thick and scaly. Bracts to 10 x 5mm, ovate-subulate, outer scaly outside; inner ones narrowly ovate-acuminate, with fragile, marginal scales, whose bases give a ciliate appearance to the margin when the scales have gone, glabrous otherwise, on both sides. Bracteoles c.10mm, filiform, laxly long-hairy and scaly. Inflorescence of solitary or paired flowers. Pedicels 12–20 x c.1mm, very densely brown-stellate-scaly. Calyx 3–4mm in diameter, obliquely disc-shaped, densely brown-stellate-scaly, the lobes obtuse, c.1mm. Corolla 15–22mm, tubular-funnel-shaped, bright pink; tube 9–14 x 3–4 x 5–6mm, densely stellately scaly outside, glabrous inside; lobes sub-spathulate-circular, wrinkled, 7–9mm in diameter, laxly scaly outside from the base to the middle, otherwise glabrous. Stamens unequal, hardly exserted from the mouth; filaments linear, slightly dilated above the base, glabrous; anthers c.1.3mm, oblong-­elliptic. Disc low, glabrous. Ovary c.5 x 3mm, ovoid-conical, densely stellately scaly, the apex obtuse or abrupt distally; style c.1.5 x 0.4–0.5mm, columnar, glabrous; stigma thick-obconical, slightly 5-lobed. Fruit c.8 x 4mm, ovoid-­ellipsoid, densely stellate-scaly, the style persistent and the stigma distinctly 5-lobed.

Distribution

Indonesia, New Guinea (W), Lake Habbema.

Altitude

Habitat

Restricted to crevices and sandy niches on sterile limestone slopes.

Nomenclatural History

Notes

References

Argent, G. (2006) Rhododendrons of subgenus Vireya. RHS:London. Page:97