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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.
Rhododendron: rhododendron trees and shrubs; Rhododendron albiflorum: white-flowered rhododendron Ericaceae (heath family) Rhododendron calendulaceum: flame azalea Ericaceae (heath family) Rhododendron catawbiense: purple laurel; Catawba rhododendron Ericaceae (heath family) Rhododendron macrophyllum: Pacific rhododendron Ericaceae (heath family)
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 ...
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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.
The family is large, with about 4,250 known species spread across 124 genera, [2] making it the 14th most species-rich family of flowering plants. [3] The many well known and economically important members of the Ericaceae include the cranberry , blueberry , huckleberry , rhododendron (including azaleas ), and various common heaths and heathers ...