Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Rhododendron viscosum (L.) Torr.
- Family: Heath (Ericaceae)
- Flowering: May-July
- Field Marks: The flowers of this species are usually white with an occasional pink tinge. It differs
from similar species except Rhododendron serrulatum by blooming in summer after the leaves
are mature. It is very similar to Rhododendron serrulatum, but differs by the corolla tube hairy
on the inside and by its winter bud scales not awned.
- Habitat: Bogs, pocosins, stream banks, swamps, wet woods, flatwoods.
- Habit: Shrub to 15 feet tall, with stiffly ascending branchlets.
- Stems: Hairy when young, becoming smooth with age; winter bud scales not awned.
- Leaves: Alternate, simple, oblanceolate to elliptic, pointed or rounded at the tip, tapering to
the base, toothless but often with cilia around the edge, usually more or less hairy, up to 4 inches
long, up to 1 1/2 inches wide; leaf stalks 1/12-1/4 inch long.
- Flowers: Several in clusters, showy, fragrant, blooming during the summer after the leaves are
mature; flower stalks 1/4-1 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, hairy 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: This species, because of its handsome flowers, has ornamental value.
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