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Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. 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.
Annual, perennial herb, subshrub, generally twining or trailing.
Leaf: 0 or alternate.
Inflorescence: cyme or flowers 1 in axils; bracts subtending flowers 0 or 2.
Flower: bisexual, radial; sepals (4)5, ± free, overlapping, persistent, often unequal; corolla generally showy, generally bell-shaped, ± shallowly 5-lobed, generally pleated and twisted in bud; stamens 5, epipetalous; pistil 1, ovary superior, chambers generally 2, each generally 2-ovuled, styles 1–2.
Fruit: generally capsule.
55–60 genera, 1600–1700 species: warm temperate to tropics; some cultivated for food or as ornamental (Ipomoea). [Stefanovic et al. 2003 Syst Bot 28:791–806] Monophyletic only if Cuscutaceae included, as treated here. Ipomoea cairica (L.) Sweet, Ipomoea hederacea Jacq. [Ipomoea nil L., misappl.], Ipomoea indica (Burm.) Merr. (including Ipomoea mutabilis Ker Gawl.), Ipomoea purpurea (L.) Roth, Ipomoea triloba L., all included in TJM (1993), not naturalized. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553; Stefanovic et al. 2002 Amer J Bot 89:1510–1522]
1. Plants non-green, parasitic, without leaves ..... CUSCUTA
1' Plants green, photosynthetic, with leaves
2. Styles 2, free or united only at base
3. Ovary not lobed; leaf elliptic; plant tufted ..... CRESSA
3' Ovary shallowly to deeply 2-lobed; leaf reniform; plant matted ..... DICHONDRA
2' Style 1
4. Stigma unlobed, head-like ..... [IPOMOEA]
4' Stigma lobes 2, oblong to linear
5. Stigma lobes oblong, not flat, tip obtuse; calyx 7–25 mm; corolla 20–75 mm ..... CALYSTEGIA
5' Stigma lobes linear to narrowly spoon-shaped, ± flat, tip acute; calyx 3–10 mm; corolla <= 40 mm ..... CONVOLVULUS
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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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