Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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Lauramay T. Dempster (except Calystegia)

Perennial (annual), generally twining or trailing
Leaves alternate
Inflorescence: cyme or flowers solitary in axils; pedicels often with 2 bracts
Flower bisexual, radial; sepals 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, ovules generally 2 per chamber, styles 1–2
Fruit: generally capsule
Seeds 1–4(6)
Genera in family: 50 genera, 1,000 species: warm temp to tropical; some cultivated as ornamental
Recent taxonomic note: Recently treated to include Cuscutaceae [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553].
(Family description, key to genera by L.T. Dempster)



Annual, perennial herb from rhizome or caudex
Stem trailing to high-climbing
Leaf petioled; blade cordate, sometimes lobed
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
Etymology: (Greek: worm-like)
Species in genus: 500 species: tropical and warm temp; some cultivated as ornamental or for food (I. batatas, sweet-potato).


I. purpurea (L.) Roth


Leaf simple; blade 7–12 cm, cordate, short-acuminate, entire, hairy
Inflorescence: peduncles 1–5-flowered
Flower: sepals 12–16 mm, lanceolate-oblong, acute, hairy; corolla 5–6 cm, purple, blue, pink or white
Chromosomes: 2n=30
Ecology: Disturbed or waste places, fields, orchards
Elevation: 15–100 m.
Bioregional distribution: Sierra Nevada Foothills, Great Central Valley, Central Western California, Southwestern California
Distribution outside California: native to tropical America
cultivated as ornamental.

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bioregional map for IPOMOEA%20purpurea being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Ipomoea purpurea
Retrieve dichotomous key for Ipomoea
Overlay Consortium of California Herbaria specimen data by county on this map
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