Rhododendron obscurum Sleumer

Reinwardtia 1960. 5: 104.

WFO ID: wfo-1000040563

IPNI ID: urn:lsid:ipni.org:names:332988-1

Verified by:

Description

Shrub to 3m. Twigs 2mm in diameter, sub-densely, minutely, reddish-brown scaly; internodes 2–3cm. Leaves 3–4 in pseudowhorls at the upper 2 or 3 nodes. Blade 45–65 x 20–30mm, elliptic-obovate; apex rounded or mostly slightly retuse; margin entire; base broadly tapering, scaly initially on both sides, at maturity glabrescent above, sub-densely and persistently scaly beneath. Scales minute, with the thin marginal zone variously indented; centre a little impressed, large and of dark-brown colour typical of the section. Mid-vein narrow and impressed above, as thick as the petiole beneath at the base and very prominent, gradually less so distally; lateral veins 7–9 per side, curved and anastomosing towards the margin, minutely impressed above, somewhat raised or nearly invisible beneath, without reticulation. Petiole 6–8 x c.2mm, grooved above, densely scaly, a little flattened. Bracts 7 x 4mm, ovate-acuminate, hairy on both sides, white-ciliate round the margins. Inflorescence a 3-­flowered umbel. Pedicels 14–18mm, slender, laxly scaly. Calyx 2.5mm in diameter, oblique, disc-shaped, very shortly or not lobed, scaly outside. Corolla 26–30mm, tubular, slightly curved, gradually widened to the mouth, pink, or orange-red; tube 20 x 3–4 x 6mm, laxly scaly outside, glabrous inside; lobes 7–10 x 4–5mm, obovate, sub-erect. Stamens unequal, the longer ones nearly as long as the corolla; filaments linear, glabrous; anthers 1–5 x 0.7mm. Disc glabrous. Ovary 4 x 1.5mm, elongate-­conical, densely scaly, gradually tapering distally; style slender, exserted; stigma rounded. Fruit 10mm.

Distribution

Malaysia, Malay Peninsula, Pahang, top of Mt Benom.

Altitude

Habitat

Reported as common in open Leptospermum woodland

Nomenclatural History

Notes

References

Argent, G. (2006) Rhododendrons of subgenus Vireya. RHS:London. Page:124