• Source: Rhododendron subg. Rhododendron

rhododendron" target="_blank">Rhododendron subgenus rhododendron" target="_blank">Rhododendron is a subgenus of the genus rhododendron" target="_blank">Rhododendron. With around 400 species, it is the largest of the eight subgenera (more recently reduced to five) containing nearly half of all known species of rhododendron" target="_blank">Rhododendron and all of the lepidote (scales on the underside of the leaves) species.




Taxonomy



The subgenus has traditionally included three sections:

rhododendron" target="_blank">Rhododendron sect. Pogonanthum Aitch. & Hemsl, type rhododendron" target="_blank">Rhododendron anthopogon D.Don. Six species; Himalaya and adjacent mountains
rhododendron" target="_blank">Rhododendron sect. rhododendron" target="_blank">Rhododendron L., type : rhododendron" target="_blank">Rhododendron ferrugineum L. 120 - 149 species in 25 subsections; temperate to subarctic Northern Hemisphere
rhododendron" target="_blank">Rhododendron sect. Vireya (Blume) Copel.f., type rhododendron" target="_blank">Rhododendron javanicum (Blume) Benn. About 300 species in 7 subsections; tropical southeast Asia, Australasia. Has at times been considered as a separate ninth subgenus.
However, following phylogenetic analysis, Craven (2008) raised the appropriately named Pseudovireya subsection of Vireya to section rank, splitting it into two geographic clades, the Asian mainland species as Pseudovireya, and the Malesian species as Discovireya, making five sections in all. The new sections are thus:

rhododendron" target="_blank">Rhododendron sect. Discovireya (Sleumer) Argent, type rhododendron" target="_blank">Rhododendron retusum (Blume) Benn. 48 species, Malesia
rhododendron" target="_blank">Rhododendron sect. Pseudodovireya (C.B.Clarke) Argent, type rhododendron" target="_blank">Rhododendron vaccinioides Hook.f. Ten species, Mainland Asia
Characteristics: (Craven 2008)

Discovireya: Scales entire to undulate; corolla tubular-cylindric; stamens 10, exserted to included, staminal filaments glabrous or hairy from the base; capsule valves not twisting after dehiscence; seeds with a distinct tail at each end
Pogonanthum: Scales incised; corolla salver-shaped; stamens 5–8, included, staminal filaments glabrous or hairy towards the base; capsule valves not twisting after dehiscence; seeds without distinct tails
Pseudovireya: Scales entire; corolla campanulate; stamens 10, exserted, staminal filaments glabrous proximally and distally and hairy in the middle region; capsule valves not twisting after dehiscence; seeds with a distinct tail at each end
rhododendron" target="_blank">Rhododendron: Scales entire to crenulate; corolla campanulate to funnel-shaped or tubular; stamens 10, exserted, staminal filaments hairy towards the base or glabrous; capsule valves not twisting after dehiscence; seeds without distinct tails
Vireya: Scales sessile or sometimes stalked, lobed to deeply incised or sometimes entire; corolla campanulate, trumpet-like, salver-shaped, tubular or funnel-shaped; stamens (5–)10(–16), exserted to included, staminal filaments glabrous or hairy from the base; capsule valves twisting after dehiscence; seeds with a distinct tail at each end
Craven also provides a formal Key to the subgenus.




= Subsections

=
rhododendron" target="_blank">Rhododendron L. (25 subsections)
rhododendron" target="_blank">Rhododendron subsect. Afghanica
rhododendron" target="_blank">Rhododendron subsect. Baileya
rhododendron" target="_blank">Rhododendron subsect. Boothia
rhododendron" target="_blank">Rhododendron subsect. Camelliiflora
rhododendron" target="_blank">Rhododendron subsect. Campylogynum
rhododendron" target="_blank">Rhododendron subsect. Caroliniana
rhododendron" target="_blank">Rhododendron subsect. Cinnabarinum
rhododendron" target="_blank">Rhododendron subsect. Edgeworthia
rhododendron" target="_blank">Rhododendron subsect. Fragariflora
rhododendron" target="_blank">Rhododendron subsect. Genestieriana
rhododendron" target="_blank">Rhododendron subsect. Glauca
rhododendron" target="_blank">Rhododendron subsect. Heliolepida
rhododendron" target="_blank">Rhododendron subsect. Lapponica
rhododendron" target="_blank">Rhododendron subsect. Ledum
rhododendron" target="_blank">Rhododendron subsect. Lepidota
rhododendron" target="_blank">Rhododendron subsect. Maddenia
rhododendron" target="_blank">Rhododendron subsect. Micrantha
rhododendron" target="_blank">Rhododendron subsect. Monantha
rhododendron" target="_blank">Rhododendron subsect. Moupinensia
rhododendron" target="_blank">Rhododendron subsect. rhododendron" target="_blank">Rhododendron
rhododendron" target="_blank">Rhododendron subsect. Rhodorastra
rhododendron" target="_blank">Rhododendron subsect. Saluenensia
rhododendron" target="_blank">Rhododendron subsect. Scabrifolia
rhododendron" target="_blank">Rhododendron subsect. Tephropepia
rhododendron" target="_blank">Rhododendron subsect. Trichoclada
rhododendron" target="_blank">Rhododendron subsect. Triflora
rhododendron" target="_blank">Rhododendron subsect. Uniflora
rhododendron" target="_blank">Rhododendron subsect. Virgata




References






Bibliography


Germplasm Resources Information Network: rhododendron" target="_blank">Rhododendron subgenus rhododendron" target="_blank">Rhododendron
Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan.
Gillian K. Brown, Lyn A. Craven, Frank Udovicic and Pauline Y. Ladiges. Phylogenetic relationships of rhododendron" target="_blank">Rhododendron section Vireya (Ericaceae) inferred from the ITS nrDNA region. Australian Systematic Botany 19, 329–342. August 2006. 10.1071/SB05019




External links



"Genus rhododendron" target="_blank">Rhododendron Taxonomic Tree". American rhododendron" target="_blank">Rhododendron Society. Retrieved 18 June 2014.

Kata Kunci Pencarian:

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• Rhododendron
• Rhododendron subg. Rhododendron
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• Rhododendron subg. Hymenanthes
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• Rhododendron hirsutum
• Rhododendron calendulaceum
• Rhododendron sect. Tsutsusi