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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.



Daniel F. Austin

Annual, perennial herb from rhizome or caudex. Stem: trailing to high-climbing. Leaf: simple or palmately compound, petioled; blade cordate, lobed or not. Inflorescence: bracts 0. Flower: corolla generally ± funnel-shaped, not or barely lobed; style 1, stigma head-like or of 2–3 spheric lobes. Fruit: spheric; valves 2–4.
500–600 species: tropics, warm temperate; some cultivated as ornamental or for food (Ipomoea batatas (L.) Lam., sweet-potato). (Greek: worm-like) Ipomoea lacunosa L. reported as urban weed from birdseed in Aptos, Santa Cruz Co.

Key to Ipomoea

1. Leaf palmately compound ..... I. cairica

1' Leaf simple, lobed or entire

2. Sepals 14–25 mm, abruptly or gradually narrowed to slender, leaf-like tip; annual, perennial herb

3. Corolla 2–6 cm; leaf sparsely strigose; sepals 16–25 mm, abruptly narrowed to tip, hairs near base 2–6 mm; annual ..... I. hederacea

3' Corolla 5–7 cm; leaf glabrous to strigose or canescent; sepals 14–20 mm, gradually narrowed to tip, hairs near base 0 to ± 1 mm; perennial herb ..... I. indica

2' Sepals 6–16 mm, abruptly narrowed to needle-like tip or not; annual

4. Corolla 4–6 cm; sepals 12–16 mm; leaf ± hairy ..... I. purpurea

4' Corolla 1–2 cm; sepals 6–7 mm; leaf glabrous ..... I. triloba


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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