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1.Kentucky Yellowwood — Overview
Cladrastis kentukea, commonly known as the Kentucky yellowwood or American yellowwood, is a captivating deciduous tree indigenous to the southeastern United States, thriving across a narrow band encompassing Kentucky, Tennessee, Alabama, Georgia, Arkansas, Missouri, Oklahoma, and North Carolina. As a member of the Fabaceae family, specifically the Papilionoideae subfamily, it is characterized by its distinctive pea-like blossoms. This medium-sized tree typically achieves heights of 30 to 50 feet (9-15 meters) with a gracefully rounded, spreading canopy.
Its most notable feature is its remarkably smooth, thin, gray bark, which remains unfurrowed even in maturity, often drawing comparisons to the bark of a European beech. Mature specimens may display subtle exfoliating patches, revealing a lighter inner bark. The heartwood, a striking golden-yellow, historically served as a valuable source for natural dyes, lending the tree its common name.
The foliage consists of elegant, alternate, odd-pinnately compound leaves, usually comprising 7 to 9 (occasionally 5 to 11) ovate to elliptical leaflets. Each leaflet exhibits an entire margin, a pointed apex, and a broad base, typically measuring 2 to 4 inches (5-10 cm) in length. The leaves unfurl as a vibrant yellow-green in spring, transition to a rich medium green during summer, and culminate in a brilliant golden-yellow in autumn, offering significant seasonal appeal.
The tree's most celebrated attribute is its profusion of pendulous, wisteria-like racemes of highly fragrant, white, pea-shaped flowers, often adorned with a delicate yellow blotch on the standard petal. These impressive clusters, extending 10-15 inches (25-38 cm) long, emerge in late spring (May to early June), creating a breathtaking display and serving as a vital attractant for numerous pollinators, including bees. Following successful pollination, the Kentucky yellowwood produces flattened, brown legume pods, approximately 2-4 inches (5-10 cm) long, containing several small, hard seeds, which mature in late summer and often persist through winter.
This species thrives in well-drained, moist soils, frequently found in limestone-rich areas, and is known for its deep root system.
Trusted Scientific References
1. Authoritative external sources for Cladrastis kentukea
1.1 Wikipedia — Cladrastis kentukea
1.2 Kew POWO (Plants of the World Online)
1.3 PubMed — peer-reviewed research
1.4 NCBI Taxonomy Browser
1.5 GBIF — Global Biodiversity
1.1.Kentucky Yellowwood — Key Features
- ✓ <strong>Deciduous shade tree</strong> — Deciduous shade tree native to southeastern United States.
- ✓ <strong>Smooth, thin, gray</strong> — Smooth, thin, gray bark, resembling that of a beech tree.
- ✓ <strong>Pendulous, fragrant, white, pea</strong> — shaped flowers in late spring.
- ✓ <strong>Brilliant golden</strong> — yellow fall foliage, providing significant seasonal interest.
- ✓ <strong>Odd</strong> — pinnately compound leaves with 7-11 ovate leaflets.
- ✓ <strong>Heartwood yields a</strong> — Heartwood yields a distinctive yellow dye, hence 'yellowwood'.
- ✓ <strong>Produces flattened legume</strong> — Produces flattened legume pods with seeds that persist into winter.
- ✓ <strong>Attracts numerous pollinators,</strong> — Attracts numerous pollinators, especially bees, and provides bird nesting sites.
- ✓ <strong>Develops a deep taproot system, making it drought</strong> — tolerant once established.
- ✓ <strong>Generally low maintenance,</strong> — Generally low maintenance, though corrective summer pruning is recommended.
1.2.Kentucky Yellowwood — Quick Summary
- ✓ Native deciduous shade tree of the southeastern U.S.
- ✓ Features fragrant white flower racemes and brilliant golden fall foliage.
- ✓ Known for its smooth gray bark and historically used yellow heartwood dye.
- ✓ Attracts pollinators like bees and provides nesting sites for birds.
- ✓ Primarily valued for its ornamental beauty; limited documented medicinal uses.
- ✓ Requires well-drained soil and summer pruning; susceptible to wind damage.
2.Kentucky Yellowwood — Scientific Identity
3.Kentucky Yellowwood — Quick Facts
4.Kentucky Yellowwood — Appearance & Identification
5.Kentucky Yellowwood — Native Habitat
6.Kentucky Yellowwood — Water Requirements
- ✓ Site Selection — Plant Kentucky yellowwood in a location with full sun exposure to partial shade, ensuring adequate light for optimal flowering and fall color.
- ✓ Soil Requirements — It thrives in well-drained, moist loamy soils, showing a preference for slightly alkaline conditions, often found naturally in limestone regions.
- ✓ Watering — While needing regular watering during establishment, Cladrastis kentukea becomes highly drought-tolerant once its deep root system is fully developed.
- ✓ Pruning — Prune only in summer after flowering to prevent sap bleeding; focus on corrective pruning to remove weak or crossing branches and maintain structural integrity.
- ✓ Transplanting — Due to its deep taproot system, transplanting established Kentucky yellowwood trees can be challenging and is best avoided or performed when the tree is very young.
- ✓ Pest and Disease Management — Monitor for Verticillium wilt, a fungal disease; protect branches from wind and heavy snow loads as they can be prone to breakage.
- ✓ Ecological Role — Plant in wildlife gardens to provide nesting sites for songbirds and high-quality pollen and nectar for bees and other beneficial pollinators.
- ✓ Winter Protection — In colder zones, protect young trees from harsh winter winds to prevent branch damage and ensure successful establishment.
Reviewed by the Flora Medical Global Botanical Review Panel
Multi-disciplinary editorial group · Botany · Ethnobotany · Herbal-medicine literature
Who reviewed this: This page was checked by the Flora Medical Global Botanical Review Panel — an in-house editorial group of botany graduates, ethnobotany researchers, and horticulture practitioners who collectively maintain our 7,000+ plant encyclopedia. Meet the team.
Our 4-step verification process
1. Taxonomic verification
Scientific names and synonyms cross-checked against Kew POWO, World Flora Online, and The Plant List.
2. Phytochemical & medicinal cross-reference
Active compounds, traditional uses, and reported activities are cross-referenced with PubMed, USDA Dr. Duke's database, and peer-reviewed ethnobotanical literature.
3. Conservation & distribution check
Distribution, ecology, and conservation status confirmed against GBIF occurrence records and the IUCN Red List.
4. Editorial & safety review
Every entry passes an editorial pass for clarity, originality, and safety notices (toxicity, contraindications, dosage caveats) before publication.
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Editorial Note: This page is for educational and plant care purposes only.
Written by: Flora Medical Global Editorial Team
Reviewed by: Flora Medical Global Botanical Review Panel
Last Updated: June 19, 2026
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