Rhododendron crassifolium is a species of tropical rhododendron, a perennial flowering plant belonging to the family Ericaceae. Description Rhododendron crassifolium is a tropical rhododendron native to mountainside forests of Borneo at . It is a medium size evergreen shrub about tall. Leaves are dark green, broad, ribbed and elliptic. The bell-shaped flowers are red-orange. The flowering period extends from June through August. Distribution This plant is native to Sabah, Malaysia on the island of Borneo. Habitat This species is typical of the shaded mountain forests. It prefers acidic, well-drained, organic soil in partial sun to partial shade. References George Argent, Anthony Lamb and Anthea Phillipps - The Rhododendrons of Sabah, Malaysian Borneo - Scientific Editor: Wong Khoon Meng Biolib The Plant List Tropicos EoL External links Dixpix Rogerstree IPNI Listing Kew Plant List crassifolium Endemic flora of Borneo Flora of Sabah Plants described in 1894