Rhododendron sayeri Sleumer

Reinwardtia 1960. 5: 188.

WFO ID: wfo-0000405373

IPNI ID: urn:lsid:ipni.org:names:333297-1

Verified by:

Description

Shrub, c.1.8m. Twigs 1.5–3mm in diameter, rounded, at first densely reddish-stellate-scaly, quickly glabrescent and smooth; internodes 3–7cm. Leaves 3–5 together in pseudowhorls. Blade 35–65 x 20–40mm, broadly elliptic, sometimes obovate-elliptic or obovate; apex broadly tapering, obtuse to rounded; margin slightly revolute proximally or quite flat; base rounded or broadly tapering; glabrescent above, sub-persistently densely reddish-scaly beneath. Scales small, deeply stellately lobed in the marginal zone; centre minute, dark and very slightly impressed. Mid-vein slightly impressed above, markedly prominent proximally beneath; lateral veins 6–8 per side, irregular, spreading, anastomosing before the margin, somewhat impressed or raised above, prominent beneath, reticulation distinct. Petiole 4–7 x 1–1.5mm, flattened and grooved above, scaly. Bracts to 10 x 8mm, ovate to obovate, obtuse, glabrous outside, very shortly fringed with scales. Bracteoles to 12 x 0.5–1.5mm, linear below, sub-spathulate distally. Inflorescence 1–4-flowered. Pedicels 15–23 x c.0.6mm, densely reddish-stellate-scaly. Calyx obliquely disc-shaped, irregularly 5-toothed, with triangular sub-acute teeth 0.5–3mm, scaly at the base outside, spreading. Corolla 40–45mm, tubular below, sub-oblique; tube c.30 x 4–5 x 7–8mm, curved, lobed at the base, laxly stellate-scaly outside, laxly and long patent-hairy inside; lobes 9–13 x 9–13mm, sub-circular. Stamens as long as the corolla tube; filaments linear, laxly patently long-hairy in the proxi­mal 2⁄3; anthers 2.5 x c.1.2mm, sub-obovoid obtuse at the base. Disc prominent, sparsely hairy on the upper margin. Ovary 5–6 x 2–2.5mm, sub-cylindrical, abruptly narrowed distally, densely stellate-scaly, without hairs; style as long as the stamens, laxly stellate-scaly in the proximal 1⁄3, glabrous distally; stigma thick-rounded.

Distribution

Papua New Guinea, Central District, Mt Obree, growing in profusion on brink of precipitous cliffs at Howers Lake

Altitude

Habitat

Nomenclatural History

Notes

References

Argent, G. (2006) Rhododendrons of subgenus Vireya. RHS:London. Page:299