Field Guide · Plant
Catawba Rhododendron
The purple-flowered rhododendron of the high summits and heath balds, in full bloom on the Roan in the third week of June.
Roan Mountain, Tennessee, in winter. A photograph of the rhododendron gardens in bloom is still to come.
- Scientific name
- Rhododendron catawbiense Michaux
- Group
- Flowering shrub, family Ericaceae
- Documented in
- Fort Mountain (one source), Roan Highlands, Roan Mountain
- Also called
- Mountain rosebay, Catawba rosebay, purple rhododendron, purple laurel
- Form
- Evergreen shrub, 5 to 20 feet tall and often wider than tall, forming thickets
- Flowers
- Large, rose to magenta. Mid-May to late June at high elevation, about June 15 to 25 at Roan Mountain
- Habitat
- Mostly above 4,000 feet, on rocky summits, heath balds and upper slopes, always on acid soil
- Range
- Southern Appalachian endemic, reaching north only to West Virginia and western Virginia
The plant
Catawba rhododendron is a big evergreen shrub, five to twenty feet tall and often broader than it is high, that grows into thickets on the upper mountains. Vascular Plants of North Carolina calls it a Southern Appalachian endemic that reaches north only as far as West Virginia and western Virginia. It is common across most of the North Carolina mountains and scarce or missing in the far southwestern counties. Up high it keeps mostly above 4,000 feet, on rocky summits and heath balds and in the forest just below them, always on acid ground. Lower down it holds on only where steep north-facing bluffs keep the air cool. The leaves are rounded at both ends, which separates it from Rhododendron maximum, and the flowers are large and rose to magenta. North Carolina’s community classification, as the state wildlife plan summarises it, names a heath bald for it, the Catawba Rhododendron subtype.
The gardens
Its showplace is the Roan. On the ridge between Roan High Knob and Roan High Bluff the shrub covers ground the Forest Service calls spectacular natural gardens, and the Rhododendron Festivals at Roan Mountain, Tennessee, and Bakersville, North Carolina, fall on the third weekend of June. The flora account puts the peak bloom on the Roan at about June 15 to 25. How much ground the gardens hold depends on which page you read: Homer Salley’s article for the American Rhododendron Society gives 200 acres in its text and about 600 in its summary box. At Craggy Gardens on the Parkway, about 5,500 feet up, the Park Service gives June for the bloom.
The name
The species bears André Michaux’s name as its author, and when he first met it is disputed. Bob Fulcher, reading a labelled specimen, thinks Michaux probably found it on the Roan in 1789. Salley puts the find near the Catawba River in 1796 and says John Fraser is sometimes credited with the Roan. The Forest Service’s Roan Mountain page names Michaux and Fraser among the botanists who described the mountain’s plants and does not try to settle the order.
Sources and further reading
- Account for Catawba Rhododendron, Rhododendron catawbienseVascular Plants of North Carolina (ncparks.gov)
- Roan Mountain Day Use AreaUSDA Forest Service, Pisgah National Forest
- Roan Mountain: Its Rhododendrons and Its FestivalsHomer Salley, Journal of the American Rhododendron Society 51(1)
- Muir, Michaux, and Gray on the RoanBob Fulcher, Tennessee Conservationist, September–October 1998
- North Carolina Wildlife Action Plan, section 4.4.7, Grass and Heath BaldsNorth Carolina Wildlife Resources Commission, 2025
- Craggy GardensNational Park Service, Blue Ridge Parkway