Viola odorata
Viola labradorica
English violet, garden violet, sweet blue violet, sweet violet, violette odorante
alpine violet, American dog or Labrador or alpine violet, American dog violet, dog violet, Labrador violet, violette du Labrador
1–5, erect (later reclining), glabrous, on caudex from subligneous rhizome.
basal (and from stolons), 5–10, ascending to erect;
stipules lanceolate to linear-lanceolate, margins fimbriate, projections gland-tipped, apex acute;
petiole 2–17 cm, puberulent;
blade unlobed, ovate to orbiculate, 1.5–7 × 1.5–5 cm, base cordate, margins crenate, ciliate, apex obtuse to rounded, surfaces puberulent.
basal and cauline;
basal: 1–5;
stipules mostly lanceolate-linear, margins usually laciniate with gland-tipped projections, apex acute;
petiole 1–9.5 cm, glabrous or puberulent;
blade reniform or ovate to deltate, 1.4–5.5 × 1.8–5.3 cm, base cordate, not decurrent on petiole, margins crenate or serrate, mostly eciliate, apex acute to obtuse, surfaces usually glabrous, sometimes pubescent adaxially near margin;
cauline similar to basal except: stipules lanceolate to ovate, margins ± entire or laciniate, projections often gland-tipped, apex acuminate;
petiole 0.5–3.6 cm, glabrous;
blade narrowly ovate to orbiculate, 1.8–2.9 × 1.5–3.1 cm, base deeply cordate to truncate, margins regularly crenate, apex obtuse to broadly rounded or apiculate.
4–15 cm, puberulent.
5–9 cm, glabrous or pubescent.
sepals narrow to broadly lanceolate, margins ciliate, auricles 3–4 mm;
petals deep to pale blue-violet, pale blue, or white on both surfaces, usually white basally, lateral 2 sparsely to densely bearded, lowest usually purple-veined, 12–22 mm, spur usually same color as petals, elongated, 5–7 mm;
style head beardless; cleistogamous flowers on prostrate or ascending peduncles.
sepals lanceolate, margins ciliate or eciliate, auricles not enlarged in fruit, 1–1.5 mm;
petals usually lavender-violet to violet on both surfaces, rarely white, lower 3 white basally, darker violet-veined, lateral 2 sparsely bearded, lowest 9–16 mm, spur white to pinkish violet, elongated, 4–8 mm, tip usually straight, sometimes curved up;
style head beardless; cleistogamous flowers unknown.
sometimes purple-flecked, ovoid, 5–8 mm, puberulent.
ovoid to ellipsoid, 5–7 mm, glabrous.
brown, 3–4 mm.
beige to bronze, 1.5–2 mm.
= 20.
= 20.
Viola odorata
Viola labradorica
Viola odorata occurs in small colonies; individual plants are interconnected by stolons.
The flowers of Viola odorata are noted for their fragrance; some plants are more fragrant than others. It is native to Eurasia and assumed to be introduced in North America where it is usually found in areas associated with human habitation, including parks, lawns, and roadsides. A substantial industry revolved around the commercial production of violets in England, France, and the United States from prior to 1895 and into the 1900s (R. E. Coombs 2003). Viola odorata is sometimes found in remote locations not easily explained by anthropogenic influence, for example, Clearwater Mountains, Idaho. It is available through the nursery trade and is cultivated as a garden plant and occasionally reported as an escape. Viola odorata is grown in southern France for essential oils used in perfumes, flavorings, and toiletries, and also for the production of the sweet, violet-colored liqueur called parfait amour (V. H. Heywood 1978).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
H. E. Ballard (1994) made a compelling case for including Viola conspersa within V. labradorica, which is followed here. Ballard (1992) did not recognize V. labradorica as occurring in Colorado. Several western herbaria have collections identified as V. labradorica (ASC, CS, KHD, RM, RMBL; http://swbiodiversity.org/seinet/index.pho). Labels on some collections at KHD imply that V. labradorica is considered synonymous with V. adunca var. bellidifolia.
Viola labradorica reportedly hybridizes with V. adunca, V. rostrata (= V. ×malteana House), and V. striata (= V. ×eclipes H. E. Ballard), and less frequently with V. walteri var. appalachiensis and var. walteri.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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