Jepson eFlora: Taxon page
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Convolvulus arvensis

Higher Taxonomy
Family: ConvolvulaceaeView DescriptionDichotomous Key

Habit: 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. Seed: 1--4(6).
Genera In Family: 55--60 genera, 1600--1700 species: warm temperate to tropics; some cultivated for food or as ornamental (Ipomoea). Note: 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.
eFlora Treatment Author: Robert E. Preston, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: ConvolvulusView DescriptionDichotomous Key

Habit: Annual, perennial herb from caudex or rhizome, generally +- glabrous. Stem: generally trailing to high-climbing, generally twisting, twining. Leaf: generally > 1 cm, generally petioled, generally cordate or hastate. Inflorescence: bracts generally 2, > 1 mm below calyx, not hiding it. Flower: generally showy; corolla generally funnel-shaped, pleated, 5-angled or -lobed; stamens included; ovary chambers 2, septa complete, stigma lobes 2, linear to narrowly spoon-shaped, tips acute. Fruit: spheric, +- inflated. Seed: generally 4.
Species In Genus: 250 species: generally temperate. Etymology: (Latin, entwine) Note: Not easily distinguished from Calystegia.

Convolvulus arvensis L.
Habit: Perennial herb from deep, persistent root. Stem: prostrate, tufted, or twining. Leaf: generally 2--3 cm, hastate, tip generally rounded. Inflorescence: peduncles generally 2.5--6 cm, 1--several-flowered, in fruit generally reflexed; bracts +- linear. Flower: calyx +- 5 mm, lobes oblong; corolla 2--2.5 cm, funnel-shaped, white, +- pink abaxially, especially at folds, margin entire. Fruit: +- 8 mm. Chromosomes: n=24.
Ecology: Roadsides, open areas in many plant communities; Elevation: < 2610 m. Bioregional Distribution: CA (rare GB, D); Distribution Outside California: native to Europe. Flowering Time: Mar--Oct
eFlora Treatment Author: Robert E. Preston
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Noxious Weed

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botanical illustration including Convolvulus arvensis


Citation for this treatment: Robert E. Preston 2016. Convolvulus arvensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 30, 2016.

Convolvulus arvensis
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© 2009 Neal Kramer
Convolvulus arvensis
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© 2008 Keir Morse
Convolvulus arvensis
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© 2009 Barry Rice
Convolvulus arvensis
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© 2004 Carol W. Witham
Convolvulus arvensis
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© 2009 Barry Rice
Convolvulus arvensis
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© 2007 Neal Kramer

More photos of Convolvulus arvensis in CalPhotos

Geographic subdivisions for Convolvulus arvensis:
CA (rare GB, D);
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.