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Rhododendron oblongifolium (Small) Millais
Ericaceae (Heath Family)
USDA Symbol: RHOB
USDA Native Status: L48 (N)
A spreading shrub to 6 ft. with distinctly obovate leaves and fragrant, trumpet-shaped, pure white flowers occuring 7-12 together after the leaves.
Related to R. viscosum. Some taxonomists argue that it is not a distinct species.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Breeding System: Flowers Bisexual
Fruit Type: Capsule
Size Notes: Up to about 6 feet tall.
Bloom InformationBloom Color: White
Bloom Time: Mar , Apr , May , Jun , Jul , Aug
DistributionUSA: AR , LA , OK , TX
Native Distribution: E. TX & OK
Native Habitat: Sandy woods; sandy stream banks; sandy bog margins.
Growing ConditionsLight Requirement: Shade
Soil Moisture: Dry
Soil pH: Acidic (pH<6.8)
Soil Description: Well-drained, sandy soil.
Conditions Comments: Related to R. serrulatum and R. viscosum. Some taxonomists argue that it is not a distinct species.
Value to Beneficial InsectsSpecial Value to Bumble Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationDescription: Combine seeds loosely with sphagnum moss and sprinkle lightly over a 2:1 perlite/peat mixture. Optimum temperatures for germination are 45-50 degrees. Transplant seedlings to acid soil with a high content of organic matter. Cultivated evergreen azaleas
Seed Treatment: No pretreatment is necessary.
Commercially Avail: yes
BibliographyBibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski
Search More Titles in Bibliography
Web ReferenceWebref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Webref 1 - Texas Native Shrubs (2002) Texas A&M University Agriculture Program and Leslie Finical, Dallas Arboretum
Additional resourcesUSDA: Find Rhododendron oblongifolium in USDA Plants
FNA: Find Rhododendron oblongifolium in the Flora of North America (if available)
Google: Search Google for Rhododendron oblongifolium
MetadataRecord Modified: 2022-10-20
Research By: TWC Staff