Rhododendron aurigeranum Sleumer

Shrub to 2 m tall. Leaves in whorls of 5 at the branch tips, mostly 8-10 cm long, 3-5 cm wide. Flowers mostly 8-10 or more, funnel-shaped orange or orange-yellow at first, fading to yellow, 6-8 cm long with a straight tube. Stamens 10.

New Guinea

Source: Davidson, B.; Craven, L.; Malone, B.; Davidson, R.; Wilson, J, ; Spencer, R. (1997). Rhododendron. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Ericales
family       Ericaceae
genus        Rhododendron L.