Viola pubescens Aiton

Downy yellow violet (en)

Species

Angiosperms > Malpighiales > Violaceae > Viola

Characteristics

Plants 1–4.5 dm from a short, stout, densely scaly, light brown or yellowish rhizome, softly hairy throughout, varying to essentially glabrous; lvs 2–4 near the top, often accompanied by 1–several long-petiolate, reniform-cordate radical lvs; cauline lvs orbicular-ovate to broadly ovate, short-pointed, crenate-dentate, with cordate or truncate-decurrent base, 4–10 cm, usually a little wider than long; stipules broadly ovate; stem often with 1 or 2 stipule-like sheathing bracts well above the base; fls on slender, axillary peduncles; pet clear yellow with brown-purple veins near the base, the lateral ones bearded; style bearded at the capitate summit; frs 10–12 mm, woolly or glabrous; seeds pale brown; 2n=12. Rich woods, or sometimes in meadows; N.S. to Man. and N.D., s. to S.C., Ga., La., and Tex. Apr.–June. (V. pensylvanica; V. eriocarpa, the more glabrate phase)
More
Plants perennial, caulescent, not stoloniferous, 10–45 cm. Stems 1–3+, ascending to erect, leafless proximally, leafy distally, glabrous or puberulent, from subligneous rhizome. Leaves basal and cauline; basal: 0–4; stipules ovate to lanceolate, margins entire, coarsely toothed, or crenate, apex acute or obtuse; petiole 2.7–19.6 cm, lanceolate, margins ciliate or eciliate, auricles 0.1–0.5 mm; petals lemon-yellow on both surfaces, lower 3 brownish purple-veined, lateral 2 and sometimes others, bearded, lowest 8–18 mm, spur yellow to greenish, gibbous, 1–2.5 mm; style head bearded; cleistogamous flowers axillary. Capsules ellipsoid, 8–12(–20) mm, glabrous or tomentose. Seeds brown, 1.8–3 mm. 2n = 12.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.1 - 0.45
Root system rhizome
Rooting depth (meter) 0.1
Root diameter (meter) 1.2
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light 3-3
Soil humidity 5-5
Soil texture -
Soil acidity 5-6
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses insecticide medicinal
Edible -
Therapeutic use Analgesic (leaf), Dermatological Aid (root), Throat Aid (root), Heart Medicine (root), Antidiarrheal (unspecified), Blood Medicine (unspecified), Cold Remedy (unspecified), Cough Medicine (unspecified), Respiratory Aid (unspecified), Tonic (unspecified), Dermatological Aid (unspecified), Gastrointestinal Aid (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 14 - 21
Germination temperacture (C°) 18 - 23
Germination luminosity dark
Germination treatment stratification
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Viola pubescens habit picture by Bre Bitz (cc-by-sa)

Leaf

Viola pubescens leaf picture by william Davidson (cc-by-sa)
Viola pubescens leaf picture by Jeff Smith (cc-by-sa)
Viola pubescens leaf picture by possiblyaturtle (cc-by-sa)

Flower

Viola pubescens flower picture by Remy Feschotte (cc-by-sa)
Viola pubescens flower picture by Michel G (cc-by-sa)
Viola pubescens flower picture by Aaron Burbach (cc-by-sa)

Distribution

Viola pubescens world distribution map, present in Canada and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:266880-2
WFO ID wfo-0001144427
COL ID 7G3RW
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Crocion achlydophyllum Crocion eriocarpum Crocion pubescens Viola eriocarpa Viola pubescens f. achlydophylla Viola pensylvanica Viola achlydophylla Viola pubescens var. pubescens Viola pubescens var. glabriuscula Viola eriocarpa var. sessilis Viola pubescens var. eriocarpa Viola pubescens var. eriocarpa Viola pubescens var. peckii Viola uniflora var. pubescens Viola pubescens

Lower taxons

Viola pubescens var. scabriuscula