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Rhododendron kaempferi × yedoense var. poukhanense

Torch azalea

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassAsteridaeA large class that encompasses asters
OrderEricalesTea, persimmon, blueberry, Brazil nut, azalea, many others
FamilyEricaceaeHeath or heather family
GenusRhododendronFrom Greek rhodos, “rose,” and dendron, “tree”
SpecieskaempferiNamed for explorer and botanist Engelbert Kaempfer

About plant names...

This azalea cultivar, one of dozens or even hundreds created by enthusiasts, is a cross between Rhododendron kaempferi and Rhododendron yedoense var. poukhanense, both of which are described below:

In 1690 Mr. Engelbert Kaempfer, a merchant from Holland introduced this species and other Japanese plants to Holland. R. kaempferi, called after him was imported again by Prof. Sargent to the USA in 1892, and then to England. After that to Europe, and here it proved to be hardy, and many hybridisers started to cross with it. The last thing I will mention is that the R. yedoense var. poukhanense from Korea is very hardy and so much used for hybridisation in the USA and in Europe. The seeds were imported first by Mr. J. Jack in 1905 to the Arnold Arboretum in Boston.[1]

(Note that azaleas are members of the rhododendron family.) This cultivar is one of many referred to as torch azaleas. I couldn't find a description of this hybrid.

Online References:





1From The Story of Hybridization of Deciduous Azaleas in Western Europe, by Walter Schmalscheidt


Rhododendron kaempferi × yedoense var. poukhanense description by Thomas H. Kent, last updated 25 May 2020.

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Rhododendron kaempferi (torch azalea)

5/15/2010 · Garden in the Woods, Framingham, Mass­a­chu­setts
≈ 3½ × 2½' (1.2 × 0.8 m)

Rhododendron kaempferi (torch azalea)

5/15/2010 · Garden in the Woods, Framingham, Mass­a­chu­setts
≈ 8 × 5" (19 × 13 cm)