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San Antonio River Authority
Sideroxylon lanuginosum ssp. oblongifolium (Nutt.) T.D. Pennington
Gum bully, Chittamwood, Gum elastic tree
Synonyms: Bumelia lanuginosa var. oblongifolia
USDA Symbol: silao
USDA Native Status: Native to U.S.
A multi-trunked shrub or medium-sized tree to 50 ft. or taller. Leathery, deciduous to semi-evergreen leaves are bright, shiny-green above and fuzzy-white below. Small, whitish flowers in dense clusters are followed by fleshy, blue-black drupes ripening from Sept. to Oct. and persisting into winter.
Slow-growing. Deep taproot aids in drought-tolerance. Can be thicket forming in favorable conditions. Although small, the flowers are fragrant. S. lanuginosa is evergreen in south Texas.
Plant CharacteristicsDuration: Perennial Habit: Shrub Fruit: Size Class:
Bloom InformationBloom Color: White
Bloom Time: Apr , May , Jun , Jul
AL , AR , IL , KS , KY , LA , MO , MS , OK , TX Native Distribution:
FL & GA to TX, AZ & adjacent Mex.; also n. inland to s. IL & s.e. KS Native Habitat:
Dry, sandy woods; swamp borders USDA Native Status: L48(N)
Growing ConditionsLight Requirement:
Part Shade Soil Moisture:
Dry Soil Description:
Rocky or sandy soils. Conditions Comments:
Slow-growing. Deep taproot
aids in drought-tolerance. Can be thicket forming in favorable conditions. Although small, the flowers are fragrant. B. lanuginosa is evergreen
in south Texas.
PropagationDescription: Propagate with treated seed sown into flats or outdoor beds in the fall. Softwood cuttings root easily.
Seed Collection: Gather fruits in fall when filled out, soft, and blue-black. Seeds can be cleaned or air-dryed with the pulp on before storage. Store in refrigerated, sealed containers for up to one year.
Seed Treatment: Scarify in concentrated sulfuric acid for 20 min. followed by stratification for 30-60 days at 41 degrees.
Commercially Avail: yes
Herbarium Specimen(s)NPSOT 0910
Collected Jun 26, 1994 in Bexar County by Harry Cliffe
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Record Modified: 2012-07-02
Research By: TWC Staff