Rhododendron xenium Gillian Brown & Craven

Novon 2003. 13: 26.

WFO ID:

IPNI ID:

Verified by:

Description

Prostrate shrub to c.20cm. Twigs rounded, moderately to densely scaly. Leaves spirally arranged. Blade 3–8 x 2–4.5mm, ovate to ovate-elliptic; apex shortly acuminate; margin entire, slightly revolute; base broadly tapering. Mid-vein impressed above in the proximal ½–2⁄3, inconspicuous; lateral veins obscure, initially scaly on both sides, quickly glabrescent above, persistently, sub-densely to laxly scaly below. Scales irregularly lobed, brown, sessile. Petiole 1–1.6 x 0.5mm, flat, scaly. Flower buds 4.5–6.5 x c.2.5mm. Bracts ovate, acuminate, sparsely scaly outside and fringed with stalked scales, inner bracts narrower and more shortly acuminate. Inflorescence a solitary flower, horizontal to semi-erect. Pedicels 15–31 x 0.6–0.9mm, densely scaly and hairy. Calyx c.2mm in diameter, 5-lobed, the lobes up to 1.5mm, scaly and hairy, margin with stalked scales. Corolla 15–20 x 13–15mm, red, sub-campanulate; tube 9–14 x 3.5–5 x 6–8mm, slightly curved, scaly outside, glabrous inside; lobes 5.5–8.5 x 6.5–8.5mm, wide-spreading, circular to circular-obovate, scaly outside in the lower middle part, overlapping for ¼–½. Stamens arranged all round the mouth, exserted to c.3mm; filaments 10–11mm, glabrous except for a few hairs at the base; anthers 1.2–1.6 x c.1mm. Disc 10-lobed, with dense, erect, white, hairs on the upper margin. Ovary 3–4 x c.2mm, sub-cylindrical, densely covered in short white hairs over a sub-dense to lax layer of scales, broadly tapering distally; style 4.3–8.4mm, hairy in the proximal ¼–½, glabrous distally; stigma globose, 5-lobed. Fruit 15–20 x c.3.5mm, fusiform.

Distribution

Indonesia, New Guinea (W), Mt Jaya (Carstensz), Carstensz Meadow.

Altitude

Habitat

Growing in peaty crevices on limestone slopes and cliffs.

Nomenclatural History

Notes

References

Argent, G. (2006) Rhododendrons of subgenus Vireya. RHS:London. Page:145