Description

Much-branched shrub, to 3m; young shoots densely clothed with spreading red-brown glandular hairs intermixed with scattered + spreading, flattened hairs. Leaves dimorphic, persistent, chartaceous; spring leaves ovate-lanceolate 3.5-6 x 1.8-2.5cm, 2-2.4 x as long as broad, apex acute to mucronate, base rounded to broadly cuneate, margin entire, covered with light brown long pilose hairs on both surfaces, hairs somewhat longer on midrib; summer leaves 15-20 x 8-10mm, otherwise as for spring leaves;.petioles 4-9mm, covered with spreading pilose hairs. Inflorescence 1-3-flowered; pedicels 5-10mm, covered with spreading glandular red-brown hairs. Calyx green, glandular-hairy and pilose, lobes ovate-lanceolate, c.2mm, ciliate. Corolla funnel-shaped, 25-35mm, orange-red to coral-pink; tube c.l2mm, outer surface glabrous, inner surface papillate. Stamens (8-) 10, unequal, as long as or longer than corolla, filaments papillate below middle. Ovary densely glandular-setose; style glabrous. Capsule ovoid, 8-10mm, glandular-setose.

Distribution

China (Taiwan)

Altitude

Habitat

Sandstone cliffs etc.

Nomenclatural History

R. oldhamii Maxim, var. glandulosum Hayata in J. Coll. Sci. Imp. Univ. Tokyo 25: 153 (1908). Syntypes: Taiwan; Suizan, in montibus Morrison, 7702ft, x 1905, Nagasawa 668; 8000ft, Nagasawa 2210; 9000ft, x 1906, Nagasawa 1807; in montibus centralibus, 10000ft, xi 1906, Kawakami & Mori 1860, omnes n.v. R. ovatosepalum Yamamoto in J. Soc. Trop. Agric. 5:405 (1933). Type: Tawian, Pref. Shinchiku, iv 1918, Simada, n,v.

Notes

References

Chamberlain, D.F. & Rae, S.J. (1990) A Revision of Rhododendron IV Subgenus Tsutsusi. Edinburgh Journal of Botany 47(2):110