Distribution: Occurring east of the Cascades crest in Washington; Washington to California and scattered in other western U.S. states; native from Great Plains to Atlantic Cost.
Habitat: Disturbed habitats and abandoned homesteads.
Flowers: May-June
Origin: Introduced from central and eastern North America
Growth Duration: Perennial
Conservation Status: Not of concern
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PNW Herbaria: Specimen records of Catalpa bignonioides in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Catalpa bignonioides checklist entry
OregonFlora: Catalpa bignonioides information
E-Flora BC: Catalpa bignonioides atlas page
CalPhotos: Catalpa bignonioides photos