Description

Shrub or small tree; shoots glabrous. Leaves rhombic, 3-5 x 2.5-3cm, apex acuminate, upper and lower surfaces sparsely covered with brown hairs when young, midrib glabrous or shortly pilose beneath, margins ciliate; petioles 4-8mm, mostly glabrous, with scattered brown hairs near leaf base. Inflorescence 1-2-flowered; pedicels 3-5mm, with scattered brown hairs. Calyx minute, ciliate. Corolla open funnel-campanulate, 20-30mm, purple, lobes 10-20mm, oblong. Stamens 10, filaments glabrous. Ovary densely strigose; style glabrous. Capsule 4-10 x 4-5mm, curved.

Distribution

Japan (E Honshu)

Altitude

Habitat

Forests

Nomenclatural History

Azalea kiyosumensis Makino, J. Jap. Bot. 6: 18 (1929); R. dilatation Miq. var. kiyosumense (Makino) Hatusima, Sci. Rep. Yokosuka City Mus. 15: 22(1969). Syntypes: Japan, Prov. Awa, Mt Kiyosumi,1929, Suszuki, n.v.; 1929, Makino, n.v. Rhododendron shimidzuanum [Honda ex] Makino , Fl. Jap. ed. 2:890(1931)

Notes

References

Chamberlain, D.F. & Rae, S.J. (1990) A Revision of Rhododendron IV Subgenus Tsutsusi. Edinburgh Journal of Botany 47(2):149