Ericaceae
Flame azalea
Rhododendron calendulaceum
- Family
- Ericaceae
- Genus
- Rhododendron
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Common names
By language (3)
- English
- Flame azalea
- Malayalam
- റോഡോഡെഡ്രോൺ കാലെൻഡുലേസിയം
- Russian
- Рододендрон ноготковидный
Synonyms
- Azalea aurantiaca F.Dietr.
- Azalea calendulacea Michx.
- Azalea calendulacea var. crocea Michx.
- Azalea conccinea Lodd.
- Azalea crocea (Michx.) Hoffmanns.
- Azalea jammea Pritz.
- Azalea speciosa Willd.
- Azalea speciosa var. aurantia (G.Lodd.) DC.
- Azalea speciosa var. coccinea (Aiton) DC.
- Rhododendron calendulaceum f. aurantium (F.Dietr.) Rehder
- Rhododendron calendulaceum f. calendulaceum
- Rhododendron calendulaceum var. croceum (Michx.) Sweet
- Rhododendron luteum var. croceum (Michx.) C.K.Schneid.
- Rhododendron speciosum (Willd.) Sweet
Characteristics
- Growth habit
- Shrub
- Lifespan
- Perennial
- In the US and Canada
- Lower 48 states: native
Plant problems
Notches in rhododendron leaves: causes and fixesNotches in rhododendron leaves usually mean root weevils. Learn how to spot them, remove adults, and check for root damage.
Rhododendron leaves curling in cold weatherRhododendron leaves often curl naturally in cold weather. Learn how to spot normal winter rolling, prevent drying, and recognize damage.
Photos
Photo: W. Bulach, CC BY-SA 4.0, from Wikimedia Commons 
Photo: SterlingHerron, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Judy Gallagher, CC BY 2.0, from Wikimedia Commons 
Photo: Ron Clausen, CC BY-SA 4.0, from Wikimedia Commons 
Photo: Daderot, CC0, from Wikimedia Commons 
Photo: Daderot, CC0, from Wikimedia Commons 
Photo: Hedwig Storch, CC BY-SA 4.0, from Wikimedia Commons
More in Rhododendron
- RhododendronRhododendron ponticumEricaceae
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- Satsuki azaleaRhododendron indicumEricaceae
- Rusty-leaved alpenroseRhododendron ferrugineumEricaceae
- BuransRhododendron arboreumEricaceae
- Rhododendron luteumEricaceae
- Hairy alpenroseRhododendron hirsutumEricaceae
- Lapland rosebayRhododendron lapponicumEricaceae
- Rusty labrador-teaRhododendron groenlandicumEricaceae
- Rhododendron dauricumEricaceae
- JindallaeRhododendron mucronulatumEricaceae
- Rhododendron schlippenbachiiEricaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0); common names, US characteristics from USDA PLANTS Database (2025-05-29, CC0 1.0). About our plant data.