Rhododendron rarum is a rhododendron species native to the Central and Bismarck Ranges of Papua New Guinea.
Description It is a compact prostrate shrub with tubular, red flowers and narrowly elliptic leaves.
Habitat This species does not tolerate frosts (RHS Hardiness rating H2), so must be grown under cover in temperate climates. Its small size and prostrate habit make it an ideal subject for a hanging basket or similar.
References
Bot. Jahrb. Syst. 55: 150 1918. Vireya.net