| Pentanthera | |
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| Rhododendron luteum | |
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| Section: | Pentanthera |
| Type species | |
| Rhododendron luteum | |
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Rhododendron sect. Pentanthera is a section of subgenus Pentanthera in the genus Rhododendron. It comprises 15-16 species of deciduous shrubs native to temperate regions of the Northern Hemisphere.
It includes two subsections:
- Pentathera
- Sinensia
Subsection Pentanthera (16 species)
- Species
| Image | Name | Distribution |
|---|---|---|
_(27254491580).jpg.webp) | Rhododendron alabamense Alfred Rehder, 1921 (Alabama azalea) | United States (Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, Tennessee) |
 | Rhododendron arborescens John Torrey, 1824 | United States (West Virginia, Pennsylvania, Tennessee, North Carolina, Georgia and Alabama.) |
.jpg.webp) | Rhododendron atlanticum Alfred Rehder, 1921 | United States (New Jersey south to Georgia.) |
 | Rhododendron austrinum (Small) Rehder 1917 | United States (Alabama, Florida, Georgia, and Mississippi) |
 | Rhododendron calendulaceum John Torrey, 1824 | United States (southern Pennsylvania and Ohio to northern Georgia.) |
 | Rhododendron canescens (Michx.) Sweet 1889 | United States(Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia ) |
 | Rhododendron colemanii Ronald F. Miller, 2008 | United States(Alabama and western Georgia) |
 | Rhododendron cumberlandense Emma Lucy Braun, 1941 | United States (Kentucky, Tennessee, Georgia, Alabama, and North Carolina.) |
 | Rhododendron eastmanii Kathleen Anne Kron, 1999 | United States (South Carolina) |
 | Rhododendron flammeum (Michx.) Sarg. 1917 | United States(Georgia and South Carolina) |
.jpg.webp) | Rhododendron luteum Sweet 1911 (yellow azalea, honeysuckle azalea) | southern Russia; and in Asia |
 | Rhododendron occidentale Torr. & A.Gray 1876 | United States(Oregon, California) |
 | Rhododendron periclymenoides (Michx.) Shinners 1962 (pink azalea, pinxterbloom azalea, pinxter flower) | United States(southern New York south to Georgia) |
_(27254491900).jpg.webp) | Rhododendron prinophyllum (Small) Millais 1917 (rose azalea, roseshell azalea) | Eastern United States |
 | Rhododendron prunifolium (Small) Millais 1917 | United States( Georgia, Alabama ) |
.jpg.webp) | Rhododendron viscosum (L.) Torr. 1824 (Swamp azalea) | Eastern United States |
Subsection Sinensia (1 species)
- Selected species
- Rhododendron molle (syn. R. japonicum)
The section is closely related to sect. Rhodora, differing from it in the flower corolla having five fully developed lobes, whereas sect. Rhodora has the upper three lobes joined into a single three-lipped lobe.
Cultivation
Most (but not all) of the cultivated azaleas belong to species in this section, and hybrids derived from them.
References
- Germplasm Resources Information Network: Rhododendron sect. Pentanthera
- Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan.
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