Viola arvensis Murray

Field pansy (en), Pensée des champs (fr), Violette des champs (fr)

Species

Angiosperms > Malpighiales > Violaceae > Viola

Characteristics

Plants annual, caulescent, not stoloniferous, 5–35 cm. Stems 1–5, usually erect, sometimes prostrate or decumbent, branched, subglabrous or puberulent, clustered on taproot. Leaves cauline; stipules palmately lobed, middle lobe oblanceolate, obovate, elliptic, or lanceolate, ± equaling leaf blade, proximal lobes dissected, shorter, margins ciliate, apex acute to obtuse; petiole 0.5–2.3 cm, glabrous or puberulent; blade: proximal ovate to ± oblong, distal narrowly or broadly lanceolate, 0.8–3.4 × 0.3–1.9 cm, base attenuate to ± truncate, margins coarsely crenate-serrate, ciliate or eciliate, apex acute to obtuse, surfaces pubescent abaxially, at least on major veins, glabrous adaxially. Peduncles 2–8 cm, glabrous or pubescent. Flowers: sepals lanceolate, margins ciliate or eciliate, auricles 2–4 mm; petals white to pale yellow on both surfaces, upper 2 ± violet, lower 3 with yellow basal area, often violet-veined, lateral 2 bearded, ± equaling or shorter than sepals, lowest with dark yellow area basally, 7–15 mm, spur blue-violet to purple, elongated, 3–5 mm; style head bearded; cleistogamous flowers absent. Capsules ± spherical, 5–9 mm, glabrous. Seeds brown, 1.5–1.9 mm. 2n = 34.
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Herbs annual or biennial, 5-50 cm tall. Stems erect to ascending, simple or with ascending branches from base, very sparsely puberulous. Stipules 2-40 mm, pinnatipartite, terminal segments largest, often leaflike, lateral ones linear to narrowly lanceolate; leaf blade 0.5-6.5 × 0.2-2.2 cm, sparsely puberulous, especially so along margin and along veins abaxially, margin crenate or serrate; lower leaves ovate or orbicular-ovate, base rounded, petioles equaling or exceeding blades; middle leaves oblong-ovate or oblong-elliptic, base cuneate, decurrent into a short petiole; upper leaves oblong-lanceolate, with indistinct petioles. Flowers few to numerous; pedicels 2.5-11 cm, glabrous, 2-bracteolate; bracteoles lanceolate. Sepals oblong-lanceolate, 4-15 mm, apex acute; basal auricles 1-4 mm, irregularly toothed. Corolla funnelform; petals yellow or ivory, obviously shorter than or nearly equaling sepals, 6-14 mm, upper ones pale, anterior one including spur 5.5-14 mm; spur 1-4 mm, not exceeding appendages, straight. Capsule 6-10 mm. Seeds oblong-ovoid, 1.5-1.8 mm. Fl. Apr-Sep, fr. Jun-Sep. 2n = 34.
Annual, with short-lived rosette; stems erect or ascending, with short hairs or glabrous, 7-30 cm tall. Lvs (1)-2-6 cm long, glabrous or with short hairs, with 3-7 crenations each side. Basal lvs broadly ovate, truncately narrowed to long petiole; stipules short, linear-lobed. Stem lvs becoming narrow-elliptic, the uppermost cuneately narrowed to short petiole; stipules usually pinnatifid, 1/2-3/4 lf length, with leaflike terminal lobe, and 3-7 linear lateral lobes. Peduncles erect, glabrous; bracts short, narrowly triangular. Fls 1-2.5 cm diam. Sepals narrowly triangular, acute, 5-8 mm long; appendages 2-3 mm long. Petals cream, the upper < or = the upper sepals, the lowest with yellow or orange blotch and purple veins, the lowest and lateral bearded; spur c. 3 mm long, = sepal appendages. Style geniculate at base, 1 mm long; stigma globose; ligule 0. Capsule ellipsoid, glabrous, 5-10 mm long. Seeds oblong, pale brown, 1.5 mm long.
Pubescent to glabrate annual to 30 cm, often branched from the base, the stem relatively robust, with short, reflexed hairs on the angles; lvs variable, the lowest orbicular to ovate, the upper oblong to elliptic or narrowly elliptic, all crenate; stipules foliaceous, laciniate into 5–9 slender segments and usually 1 lf-like segment often nearly as large as the main blade; fls 1–1.5 cm long, scarcely 1 cm wide; pet shorter than or barely equaling the broadly lanceolate sep, all pale yellow (“ivory”) or occasionally with purplish tips; spur short; style as in no. 27 [Viola rafinesquii Greene]; cleistogamous fls wanting; frs globose to ellipsoid, 5–10 mm; seeds brown; 2n=34. Native of Europe, now established as a weed in or near fields or along roadsides throughout our range and s. and w. Apr.–Sept.
Annual or biennial herb with decumbent, angular stems, sparsely pubescent. Leaves cauline; lamina broadly ovate to narrowly elliptic, obtuse, 10–35 mm long, 5–15 mm wide, obtusely serrate to crenate; petiole 10–20 mm long; stipules to 4 cm long, pinnately lobed, the midlobe toothed, leaf-like. Flower-scapes 3–8 cm long; bracteoles just below flower. Sepals lanceolate, acute to acuminate, 6–10 mm long, ciliate, with prominent basal appendages. Petals 5–10 mm long, the anterior shortly spurred, creamy white with yellow-orange base and sometimes variable amounts of violet; upper petals pale violet. Anthers ciliate. Style globose, with or without a stylar flap. Capsule trigonous, 5–9 mm long. Seed c. 1.5 mm long, golden-brown; aril very small.
Annual herb, up to 0.3 m high. Leaves oblong-spathulate, up to 50 mm long, pubescent both sides, apex acute or obtuse, margins crenate; petioles with deflexed hairs, up to 7 mm long; stipules 0.50-0.75X as long as leaf, coarsely pinnatifid. Flowers with bracts in upper 1/3 of peduncle, axillary. Sepals lanceolate, subequal. Petals yellow to bluish violet, up to 15 mm long; spur equaling calycine appendages. Stamens with very short, free filaments; anthers with nectariferous appendages, petaloid. Ovary unilocular with 3 parietal placentas, stigma terminal. Flowering time Oct.-Dec. Fruit a 3-lobed capsule. Seeds globose, pointed below and above.
A herb. It grows for one or two years. It grows 5-50 cm tall. The leaves are 1-7 cm long by 1-2 cm wide. They have some hairs especially along the edges and veins. There are some teeth along the edge. There can be a few or many flowers. They are funnel shaped and yellow.
Life form annual
Growth form herb
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread myrmecochory
Mature width (meter) -
Mature height (meter) 0.05 - 0.35
Root system tap-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway c3

Environment

It is a Mediterranean plant. It grows in exposed places and abandoned fields. In Argentina it grows from sea level to 1,100 m above sea level.
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Found in pasture, on road verges and disturbed moist sites.
Light -
Soil humidity -
Soil texture 3-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

The leaves are boiled and eaten. The small flowers are eaten fresh in salads.
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Cultivated garden flower.
Uses medicinal
Edible flowers leaves
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 11 - 18
Germination temperacture (C°) 20 - 22
Germination luminosity dark
Germination treatment stratification
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Viola arvensis habit picture by Ornel Jokerrr83 (cc-by-sa)
Viola arvensis habit picture by Kate Senatskaya (cc-by-sa)
Viola arvensis habit picture by Gradwohl Markus (cc-by-sa)

Leaf

Viola arvensis leaf picture by Ornel Jokerrr83 (cc-by-sa)
Viola arvensis leaf picture by S R (cc-by-sa)
Viola arvensis leaf picture by Olivier Dorson (cc-by-sa)

Flower

Viola arvensis flower picture by Anolata (cc-by-sa)
Viola arvensis flower picture by Jan de Boer (cc-by-sa)
Viola arvensis flower picture by Joaquín Iglesias (cc-by-sa)

Fruit

Viola arvensis fruit picture by Jacques Maréchal (cc-by-sa)
Viola arvensis fruit picture by John Reihs (cc-by-sa)
Viola arvensis fruit picture by cscoq (cc-by-sa)

Distribution

Viola arvensis world distribution map, present in Australia, Canada, China, France, New Zealand, United States of America, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:291320-2
WFO ID wfo-0000426676
COL ID 5BGDQ
BDTFX ID 72065
INPN ID 129506
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Viola gracilescens Viola deseglisei Viola latifolia Mnemion arvense Viola aurasiaca Viola atlantica Viola arvatica Viola segetalis Mnemion obtusifolium Mnemion gracilescens Mnemion agreste Viola agrestis Mnemion segetale Viola tricolor var. arvensis Viola arvensis subsp. arvensis Viola arvensis

Lower taxons

Viola arvensis subsp. megalantha