Azalea lutea auct. non L.
Rhododendron calendulaceum (Michx.) Torr.
Flame azalea
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Azalea calendulacea Michx.
Azalea lutea auct. non L.
Azalea lutea auct. non L.
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 7 × 4½″ (17 × 11 cm) 
5/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 7 × 4½″ (17 × 11 cm) 
ID is uncertain 
5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 7 × 5″ (18 × 13 cm) 
5/22/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 3 × 2′ (90 × 69 cm) ID is uncertain 
5/27/2016 · Acton Arboretum, Acton, Massachusetts · ≈ 11 × 7″ (27 × 17 cm) 
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 1½ × 1′ (52 × 34 cm) ID is uncertain 
5/27/2016 · Acton Arboretum, Acton, Massachusetts · ≈ 8 × 5″ (20 × 13 cm) 
5/27/2016 · Acton Arboretum, Acton, Massachusetts · ≈ 8 × 6″ (20 × 16 cm) 
5/27/2016 · Acton Arboretum, Acton, Massachusetts · ≈ 7 × 5″ (17 × 13 cm) 
6/15/2010 · Garden in the Woods, Framingham, Massachusetts · ≈ 12 × 8″ (31 × 20 cm) ID is uncertain 
6/22/2017 · Garden in the Woods, Framingham, Massachusetts · ≈ 6 × 4″ (16 × 11 cm) 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Asteridae | A large class that encompasses asters |
| Order | Ericales | Tea, persimmon, blueberry, Brazil nut, azalea, many others |
| Family | Ericaceae | Heath or heather family |
| Genus | Rhododendron | From Greek rhodos, “rose,” and dendron, “tree” |
| Species | calendulaceum | From Latin calendae, “calendar,” a reference to the long flowering season |
Rhododendron calendulaceum description by Thomas H. Kent, not updated.
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