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Hymenanthes, with approximately 225 species, and subgenus Rhododendron, with approx. 400 species, comprise what gardeners typically describe as "Rhododendrons." Two subgenera are generally known to gardeners as "Azaleas", and include many fewer true species: Pentanthera , which comprises the deciduous azaleas, and Tsutsusi , which includes ...
Rhododendron ferrugineum may grow up to 1.5 m (4.9 ft) tall and produces clusters of pinkish-red, bell-shaped flowers throughout the summer. The undersides of the leaves are covered in rust-brown spots, which give the species the second part of its binomial name (ferrugineum, Latin for 'rust-coloured, ferruginous').
Rhododendron is a genus of shrubs and small to (rarely) large trees, the smallest species growing to 10–100 cm (4–40 in) tall, and the largest, R. protistum var. giganteum, reported to 30 m (100 ft) tall.
The following is a list of widely known trees and shrubs. [1] [2 ... likewise the genera and closely related species. The list currently includes 1352 species ...
Traditional to botanical taxonomy, subdivisions of taxonomic ranks further divide subgenera, sections, and subsections into species and subspecies/varieties. Genus Rhododendron consists of eight subgenera based on morphology; this page refers to only those lower divisions in subgenus Rhododendron, commonly known as the scaly or lepidote ...
Rhododendron hirsutum A species of the Vireya section.. Rhododendron subgenus Rhododendron is a subgenus of the genus Rhododendron.With around 400 species, it is the largest of the eight subgenera (more recently reduced to five) [1] containing nearly half of all known species of Rhododendron and all of the lepidote (scales on the underside of the leaves) species.
C. Rhododendron calendulaceum; Rhododendron calophytum; Rhododendron calostrotum; Rhododendron campanulatum; Rhododendron campylocarpum; Rhododendron campylogynum
Rhododendron arboreum from Fyson [5]. Rhododendron arboreum subsp. cinnamomeum has leaves with cinnamon-brown hairs beneath; Flower of Rhododendron arboreum from Yumthang Valley in North Sikkim, India Rhododendron arboreum subsp. zeylanicum rare ssp from the highlands of Sri Lanka, named after Zeilan, the name used by Arabian traders to refer to Sri Lanka