Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Hammock Sweet Azalea
Rhododendron serrulatum (Small) Millais
- Family: Heath (Ericaceae)
- Flowering: May-July
- Field Marks: This species has flowers with white petals that are sometimes pink-tinged and
which bloom in the summer after the leaves are mature. It differs from Rhododendron viscosum
by having the inside of the corolla tube smooth and its winter buds with awned scales.
- Habitat: Low pinelands, moist hammocks, bayheads, swamps, bogs, wet woodlands,
- Habit: Shrub to 15 feet tall, with stiffly ascending branchlets.
- Stems: Hairy when young, becoming smooth with age; winter bud scales awned.
- Leaves: Alternate, simple, oblanceolate to obovate, pointed or rounded at the tip, tapering to
the base, toothless but often with cilia around the edge, usually with some degree of hairiness,
up to 4 inches long, up to 1 1/2 inches wide; leaf stalks up to 1/4 inch long.
- Flowers: Several in clusters, showy, fragrant, blooming during the summer after the leaves are
mature; flower stalks up to 1 inch long, hairy.
- Sepals: 5, green, united below, sparsely glandular-hairy.
- Petals: 5, white, sometimes pink-tinged, united below into a long tube, the tube up to 1 inch
long, smooth on the inside, the lobes up to 1/2 inch long.
- Stamens: 5, exserted beyond the corolla.
- Pistils: Ovary superior.
- Fruits: Capsules up to 1 inch long, glandular-hairy.
- Notes: Some botanists consider this plant to be a variety of Rhododendron viscosurm.
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