J. Jap. Bot. 7:21 (1930). Type: Japan, Prov. Idzu, Mt Amagi, Makino, n.v.
Verified by:
Tree, to 5m; young shoots densely covered with white soft hairs, later glabrescent. Leaves broadly ovate-rhombic, 4-9 x 3-9cm, apex acuminate, upper surface with long scattered brown hairs, lower surface with adpressed brown pubescent hairs, especially on midrib; petioles 5-10mm, densely adpressed-brown-pubescent. Inflorescence 1-3-flowered; pedicels 6-13mm, densely pubescent. Corolla open-campanu-late, 25-40mm, reddish-orange, upper lobe with darker flecks, lobes 25mm, oblong. Stamens 10, glabrous. Ovary densely brown-pubescent; style with white pubescent hairs at base. Capsule ovoid, 15-20mm, densely pubescent.
Japan (Hondo, Idzu Peninsula)
R. weyrichii Maxim, var. amagianum (Makino) Hatusima, Sci. Rep. Yokosuka City Mus. 15: 23 (1969)
Chamberlain, D.F. & Rae, S.J. (1990) A Revision of Rhododendron IV Subgenus Tsutsusi. Edinburgh Journal of Botany 47(2):152