Jepson eFlora: Taxon page
Vascular Plants of California
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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.
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
Jepson eFlora Author: Robert E. Preston
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Noxious Weed listed on the CDFA Weed Pest Ratings table
View the CDFA Pest Rating page for Convolvulus arvensis
Weed listed by Cal-IPC

Previous taxon: Convolvulus althaeoides
Next taxon: Convolvulus simulans

Botanical illustration including Convolvulus arvensisbotanical illustration including Convolvulus arvensis

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Citation for this treatment: Robert E. Preston 2012, Convolvulus arvensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 20, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on July 20, 2024.

Convolvulus arvensis
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©2004 Carol W. Witham
Convolvulus arvensis
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©2009 Barry Breckling
Convolvulus arvensis
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©2022 California Academy of Sciences
Convolvulus arvensis
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©2008 Keir Morse
Convolvulus arvensis
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©2011 Neal Kramer

More photos of Convolvulus arvensis
in CalPhotos

Geographic subdivisions for Convolvulus arvensis:
CA (rare GB, D)
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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 occurrence).


Data provided by the participants of the  Consortium of California Herbaria.

View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month Flowering-Fruiting Monthly Counts

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).