Suggested Reading:
Greer's Guidebook to Available Rhododendrons
The Rhododendron Species : Azaleas
A good site
for research is the Washington
State University's web
Use their search feature to find answers to questions we weren't able to answer for you.
Search Amazon for books on Rhododendrons and Azaleas.
Rhododendron,
common name for flowering plants of a genus of the heath
family. The genus contains some 850 species, the majority of which are
cultivated. Native to the temperate areas of the Northern Hemisphere,
rhododendrons are most abundant in the Himalayas, southeast Asia, and
the mountains of Malaysia. Cultivated species can now be found on all
continents. Rhododendrons exhibit great variety in size, habit, and
flower color. They range from small, ground-hugging shrubs to small
trees, and from white to pink, dark-purple, or yellow flowers. Most
species are evergreen—that is, they retain their foliage throughout
the year. The deciduous species of rhododendron, those that lose all of
their foliage each year, are known in horticulture as azaleas.
Scientific
classification: Rhododendrons make up the genus Rhododendron
of the family Ericaceae.
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