Rhododendron simulans Sleumer

Reinwardtia 1960. 5: 168.

WFO ID:

IPNI ID:

Verified by:

Description

Shrub to 70cm. Twigs 1.5–2mm in diameter, rounded, tips densely covered with stalked scales, older parts glabrescent, densely warty and rough; internodes 2–6cm. Leaves crowded at the tips or 3–5 together in pseudo­whorls. Blade 15–20 x 6–10mm, narrowly elliptic to elliptic or sub-obovate-elliptic; apex shortly acuminate, broadly acute, with a very small terminal gland; margin cartilaginous, distinctly revolute, especially proximally; base tapering and decurrent, the extreme base often sub-truncate; glabrescent above when mature; sub-densely scaly beneath. Scales angular or lobed, flat; centre small, slightly elevated on small protrusions. Mid-vein impressed above; thick and strong proximally beneath, gradually narrowed distally; lateral veins inconspicuous. Petiole 2–3 x c.1mm, nearly rounded. Flower buds to 18 x 8mm, narrowly ovate, narrowly acute, the subulate points to the bracts standing slightly out. Bracts to 20 x 6mm, membranous, outer ones subulate, inner ones ovate-acuminate, apex subulate, glabrous and glossy. Inflorescence 2–4-flowered. Pedicels c.15mm, thick, densely covered with reddish stellate scales, without hairs. Calyx c.3mm in diameter, obliquely disc-shaped, red, shortly irregularly 5-lobed, scaly outside. Corolla c.25mm, tubular below, funnel-shaped distally, fleshy, red, with a few scales, or glabrous outside, glabrous inside; tube 16–20 x c.5 x 7–10mm, straight, base lobed; lobes 7–10 x 7–10mm, spreading, broadly obovate or sub-circular. Stamens sub-equal, 22–24mm long; filaments linear, glabrous; anthers 2–2.5 x 1mm, ellipsoid. Disc very prominent, glabrous. Ovary c.5 x 2.5mm, sub-ovoid-cylindrical, densely reddish-brown-stellate-scaly, gradually tapering distally; style c.17mm, glabrous; stigma thick-obconical, distinctly 5-lobed. Fruit 20–23 x 6mm, sub-cylindrical, the thin valves twisted.

Distribution

Indonesia, New Guinea (W), Mt Doorman, on steep open slopes with rocks.

Altitude

Habitat

Nomenclatural History

R. simulans J.J.Sm. ex Lam, Nat. Tijd. N.I. 1929. 89: 95, 99, 133, 134 nom. nud. R. wrightianum Koord. var. ovalifolium J.J.Sm., Nova Guinea 1936. 18: 94, pro parte.

Notes

References

Argent, G. (2006) Rhododendrons of subgenus Vireya. RHS:London. Page:230