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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Tree, deciduous. Leaf: simple, opposite to whorled, cordate. Inflorescence: panicle, terminal. Flower: calyx inflated, 2-lipped, purple-green; corolla fragrant, lower petal notched; stamens included, anther sacs 2; staminode included, glabrous. Fruit: linear, not flat. Seed: 6–12 mm, oblong; glabrous.
10 species: temperate North America, eastern Asia. (Muscogee: winged head, for corolla)
Unabridged etymology: (Muscogee: kut├║hlpa, winged head, for corolla; corrupted to "Cataba" and "Catawba" based on erroneous attribution to a different tribe of Native Americans; both "Caltalpah" and "Catalpa" used by Catesby, who introduced the plant to England in 1726; Linnaeus published Bignonia catalpa in 1753; Scopoli established the genus Catalpa in 1777)
Unabridged references: [Ness 2003 Oecologia 134:210–218]

Key to Catalpa

1. Leaf blade 10–26 cm, tips acute; corolla < 3.5 cm, white with yellow and purple markings in throat; calyx < 15 mm ..... C. bignonioides

1' Leaf blade 15–30 cm, tips acuminate; corolla 4–6 cm, white with yellow stripes or brown dots in throat; calyx 15–25 mm ..... C. speciosa


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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