Genus Rhododendron
Rhododendron is a genus characterized by shrubs and small to large trees, the smallest species growing to 10–100 centimetres tall, and the largest, R.Species in the genus Rhododendron of plants
Rhododendron album - Rhododendron album is a species of plant in the Ericaceae family. It is endemic to Indonesia. It is a Vulnerable species threatened by habitat loss.
Rhododendron kanehirai - Rhododendron kanehirai was a species of plant in the Ericaceae family. It was endemic to Taiwan. It became extinct in the wild and exists only in cultivated form.
Rhododendron wattii - This species is highly questionable. It is not in cultivation. It is known only from a single drawing by Sir George Watt, made when he collected it on '“Ching Sow” in “Manipur” at 9,000 ft. in 1882.' The mountain has not been identified since under this name. At least one recent expedition to the area searching for this plant has failed to find it, even though the area is still largely unexploited. Seed collected at the time of the original sighting failed to produce plants of the same description, suggesting that this species was either a small local population or a single specimen of hybrid origin between R. macabeanum and R. arboreum.
Rhododendron wilhelminae - Rhododendron wilhelminae is a species of plant in the Ericaceae family. It is endemic to Indonesia.