Viola hallii A.Gray

Oregon violet (en)

Species

Angiosperms > Malpighiales > Violaceae > Viola

Characteristics

Plants perennial, caulescent, not stoloniferous, 5–22 cm. Stems 1–3, decumbent or ascending to erect, ca. 1/2 subterranean, glabrous, clustered on single, short, vertical, deep-seated caudex. Leaves basal and cauline; basal: 1–4, palmately compound, ± 2-ternate or 3-ternate, leaflets 3; stipules adnate to petiole, forming 2 linear-lanceolate wings, unlobed, margins entire, apex of each wing free, acute; petiole 5–8 cm, glabrous; blade ovate to deltate, 2.8–6 × 2.6–6.5 cm, ± coriaceous, base tapered, ultimate lobes narrowly elliptic, lanceolate, or oblanceolate, 1–7 mm wide, margins entire, ciliate or eciliate, apex acute, mucronulate, surfaces glabrous; cauline similar to basal except: stipules usually lanceolate, sometimes broadly ovate, ± leaflike, margins toothed; petiole 1.3–6 cm; blade 2–4.8 × 1.2–5.5 cm. Peduncles 2.5–11 cm, glabrous. Flowers: sepals lanceolate to ovate, margins ciliate, auricles 0.5–1 mm; petals: upper 2 almost black abaxially, dark reddish violet adaxially, lower 3 pale yellow, cream, or ± white, lateral 2 bearded, with deep yellow to orange patch basally, dark reddish violet-veined, lowest with deep yellow to orange patch basally, dark reddish violet-veined, 5–18 mm, spur yellow, gibbous, 0.5–2 mm; style head bearded; cleistogamous flowers absent. Capsules ellipsoid, 4–12 mm, glabrous. Seeds light brown, shiny, 3.2–3.5 mm. 2n = 60, 72.
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.05 - 0.22
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

Usage

Uses -
Edible -
Therapeutic use -
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

Viola hallii unspecified picture

Distribution

Viola hallii world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:868278-1
WFO ID wfo-0001144636
COL ID 7G3QD
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Viola hallii