Contains 14 accepted taxa overall.
Characteristics
Classification
Citation
RHODODENDRON Linnaeus, Sp. Pl. 392. 1753.
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TYPE: Rhododendron ferrugineum Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 2: 680. 1913.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Rhododendron arborescens | Sweet Azalea, Smooth Azalea | |||
| Rhododendron atlanticum | Dwarf Azalea | |||
| Rhododendron calendulaceum | Flame Azalea | |||
| Rhododendron canescens | Piedmont Azalea, Southern Pinxter Azalea, Wild Azalea | |||
| Rhododendron carolinianum | Carolina Rhododendron, Punctatum | |||
| Rhododendron catawbiense | Pink Laurel, Catawba Rhododendron, Mountain Rosebay | |||
| Rhododendron eastmanii | May White Azalea, Eastman's Azalea | |||
| Rhododendron flammeum | Oconee Azalea | |||
| Rhododendron maximum | Great Laurel, White Rosebay, Great Rhododendron | |||
| Rhododendron minus | Gorge Rhododendron, Punctatum | |||
| Rhododendron periclymenoides | Wild Azalea, Pinxterflower, Pinxterbloom Azalea, Election Pink | |||
| Rhododendron serrulatum | Swamp Azalea, Clammy Azalea | |||
| Rhododendron viscosum var. montanum | ||||
| Rhododendron viscosum var. viscosum | Swamp Azalea, Clammy Azalea |
Identification Key
1. Plant ferruginous-lepidote with glandular-peltate scales; leaves evergreen, often revolute; corolla upper lobe with spots; stamens 10 per flower
1. Plant glabrous, hairy, or stipitate-glandular, not lepidote, without peltate scales; leaves evergreen or deciduous, plane; corolla upper lobe lacking spots; stamens 5 per flower
2
2. Leaves deciduous; corolla upper lobe lacking spots; stamens 5 per flower; native, sometimes cultivated, usually forming fruit
3
2. Leaves evergreen or nearly so; corolla upper lobe with or withou spots or flecks; stamens 5 or 10 per flower; cultivated, often not forming fruit
6
3. Leaves mostly fully developed or nearly so before flowers open, vegetative bud scales absent; flowers opening after appearance of leaves; corolla white, rarely pinkish, without blotches or spots on the upper lobe
3. Leaves mostly appearing simultaneous with or after flowers, vegetative bud scales often present; flowers opening before or with appearance of leaves; corolla white, pink, or yellow to orange, the upper lobe with or without contrasting or darker colored areas
4
4. Corolla white to pink, the tube darker colored and pinkish, upper lobe without contrasting or darker colored area
4. Corolla white, pink-tinged, the tube white to greenish or corolla yellow to orange, the tube yellow to reddish, the upper lobe often with darker or contrasting area (sometimes obscure)
5
5. Stems, leaf blade upper surface, and fruit eglandular-hairy; flowers fragrant; corolla white, rarely pinkish, upper lobe with contrasting yellowish area
5. Stems, leaf blade upper surface, and fruit stipitate-glandular; flowers usually inodorous or slightly fragrant; corolla yellow, orange, to orange-red (tube often orange-red or red), upper lobe with indistinct darker yellow, orange, or red blotch
6. Young stems villous, glandular; corolla white (infrequently pale red), upper lobe lacking flecks; stamens 10, longer than the corolla
6. Young stems strigose, eglandular; corolla variously colored, sometimes white, upper lobe with darker colored spots or flecks; stamens 5 or 10, shorter than to subequal to corolla
7
7. Leaf blades 1.7-3.2(4.5) cm long, 0.5-1.2 cm wide; corolla pink to red; stamens (4)5(6)
8
7. Leaf blades 1.5-5(7) cm long, 0.5-3 cm wide; corolla variously colored, including red; stamens (6)7-10
9
8. Pedicel white-strigose; corolla 3-4 cm long
8. Pedicel ferruginous-strigose; corolla 1.2-2.5 cm long
9. Corolla pink to rose-purple, (4.5)4.8-5.2(6) cm long; stamens shorter than the corolla
9. Corolla variously colored, 3.5-4(4.5) cm long; stamens subequal to corolla
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||