Bot. Mag. (Tokyo) 49: 498 (1935). Type: Japan, Kyushyu, prov. Osumi,
Takakumayama, 5 v 1932, Sugimoto (holo. TI, n.v.).
WFO ID: wfo-0000405682
IPNI ID: urn:lsid:ipni.org:names:333576-1
Verified by:
Shrub, 2-3m; young shoots soon glabrescent. Leaves rhombic, 1.4-4.3 x 0.7-1.3cm, apex acute, upper surface with a brown pilose indumentum at first, later glabrescent, lower surface pale, with punctate glands, sometimes viscous; petioles 3-5mm, with long eglandular hairs, at least when young. Inflorescence l(-2)-flowered, flowers appearing before the leaves; pedicels 5-6mm, brown-pilose and glandular-verrucose. Calyx minute, brown-ciliate. Corolla open funnel-campanulate, a 17mm, reddish-purple, with flecks, lobes oblong or elliptic, a 12mm. Stamens 10, unequal, filaments glabrous. Ovary glandular and viscous, with brown hairs at apex; style glabrous, viscous. Capsule c.4mm.
Japan (Kyushyu)
Upland forests
R. decandrum Makino var. viscistylum (Nakai) Hatusima, Sci. Rep. Yukosuka City Mus. 15: 21 (1969)
Chamberlain, D.F. & Rae, S.J. (1990) A Revision of Rhododendron IV Subgenus Tsutsusi. Edinburgh Journal of Botany 47(2):147