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Rhododendron sect. Pentanthera

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Rhododendron sect. Pentanthera
Rhododendron luteum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Genus: Rhododendron
Subgenus: Rhododendron subg. Hymenanthes
Section: Rhododendron sect. Pentanthera
G.Don
Type species
Rhododendron luteum
Species

See text

Rhododendron sect. Pentanthera is a section of subgenus Hymenanthes 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)

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Species
Image Name Distribution
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.)
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)
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)
Rhododendron prinophyllum (Small) Millais 1917 (rose azalea, roseshell azalea) Eastern United States
Rhododendron prunifolium (Small) Millais 1917 United States( Georgia, Alabama )
Rhododendron viscosum (L.) Torr. 1824 (Swamp azalea) Eastern United States


Subsection Sinensia (2 species)

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Selected species
Image Name Distribution
Rhododendron molle (Blume) G.Don 1834 S. China
Rhododendron japonicum[1] (A.Gray) Suringar, 1908 Japan (Honshu, Shikoku, N. Kyushu).

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

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Most (but not all) of the cultivated azaleas belong to species in this section, and hybrids derived from them.

References

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