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Published In: Species Plantarum 1: 392. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Comment/Acknowledgements: Rhododendron has about 800 species and is much the largest of all the genera of Ericaceae; chiefly distributed in the mountains of Eastern Asia, the Himalayas, South West China, New Guinea, North America and certain parts of Europe.


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Evergreen or deciduous shrubs or trees, often scaly, aromatic. Leaves alternate, clustered at the ends of branches, shortly petiolate, usually leathery. Flowers in terminal clusters, rarely solitary, pedicellate, often large, showy. Calyx 5-lobed, often very small. Corolla 5-lobed, less often 6-10-lobed, slightly zygomorphic, rotate, campanulate, saucer-shaped or tubular. Stamens 5-10; anthers dehiscing by apical pores. Ovary 5-10-Jocular; ovules nume¬rous. Fruit capsular; dehiscence septicidal, 5-10-valvular. Seeds minute, numerous.

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1 Shrubs. Corolla not crimson. Ovary glabrous or scaly (2)
+ Trees. Corolla scarlet crimson. Ovary densely woolly Rhododendron arboreum
2 (1) Corolla not light purple, 0.6-2 cm long. Capsule 0.4-1 cm long (3)
+ Corolla light purple, 2.5-3 cm long. capsule 2-3 cm long Rhododendron campanulatum
3 (2) Only ventral leaf surface scaly. Flowers in clusters of 8-15 (4)
+ Leaf surfaces scaly on both the sides. Flowers solitary or in clusters of 2-5 Rhododendron lepidotum
4 (3) Corolla greenish-white or pink, saucer-shaped or campanulate. Stamens 10 (5)
+ Corolla yellow, broadly cylindrical. Stamens 6-8 Rhododendron hypenanthum
5 (4) Calyx segments oblong. Corolla saucer-shaped, tube pilose inside. Stamens included Rhododendron collettianum
+ Calyx segments orbicular. Corolla campanulate, tube glabrous. Stamens exserted Rhododendron afghanicum
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