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Rhododendron subg. Azaleastrum
Rhododendron leptothrium
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Ericales
Family:	Ericaceae
Genus:	Rhododendron
Subgenus:	Rhododendron subg. Azaleastrum Planch.
Type species
Rhododendron ovatum
Sections
Azaleastrum Sciadorhodion Tsutsusi

Rhododendron subgenus Azaleastrum is a subgenus of the genus Rhododendron.

The subgenus included two sections, however in 2005, Choniastrum was elevated to subgenus rank, but sections Sciadorhodion and Tsutsusi were added, providing a new total of three sections.

• Azaleastrum sect. Azaleastrum (4 species)
• Azaleastrum sect. Sciadorhodion
• Azaleastrum sect. Tsutsusi (81 species)

References

1. Chamberlain, DF; Hyam R; Argent G; Fairweather G; Walter KS (1996). The genus Rhododendron: its classification and synonymy. Royal Botanic gardens Edinburgh. ISBN 1-872291-66-X. Archived from the original on July 14, 2014. Retrieved July 3, 2014.
2. Goetsch, Loretta A.; Eckert, Andrew J.; Hall, Benjamin D. (July–September 2005). "The molecular systematics of Rhododendron (Ericaceae): a phylogeny based upon RPB2 gene sequences". Systematic Botany. 30 (3): 616–626. doi:10.1600/0363644054782170. S2CID 51949019.

Bibliography

• Wilson EH, Rehder A. A MONOGRAPH OF AZALEAS RHODODENDRON SUBGENUS ANTHODENDRON. THE UNIVERSITY PRESS, CAMBRIDGE April 15 1921. PUBLICATIONS OF THE ARNOLD ARBORETUM, No. 9
• Craven, L.A.; Goetsch, L.A.; Hall, B.D.; Brown, G.K. (2008). "Classification of the Vireya group of Rhododendron (Ericaceae)". Blumea - Biodiversity, Evolution and Biogeography of Plants. 53 (2): 435. doi:10.3767/000651908X608070.

v t e Subgenera, sections and species of genus Rhododendron, according to morphological (Chamberlain) and phylogenetic (Goetsch, Craven) schemes
Chamberlain (1996)	Rhododendron Pogonathum Rhododendron Vireya Hymenanthes Ponticum Pentanthera Pentanthera Rhodora Sciadorhodion Viscidula Tsutsusi Brachycalyx Tsutsusi Azaleastrum Azaleastrum Choniastrum Candidastrum R. albiflorum Mumeazalea R. semibarbatum Therorhodion R. camtschaticum R. redowskianun
Goetsch (2005) Craven (2008)	Rhododendron Discovireya Pogonathum Pseudovireya Rhododendron Vireya Choniastrum 11 species Hymenanthes Ponticum Pentanthera Azaleastrum Azaleastrum Sciadorhodion Tsutsusi Therorhodion R. camtschaticum R. redowskianun

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