Viola odorata |
Viola nuttallii |
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English violet, garden violet, sweet blue violet, sweet violet, violette odorante |
Nuttall's or Nuttall's yellow or yellow prairie violet, Nuttall's violet, violette de Nuttall, yellow prairie violet |
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Habit | Plants perennial, acaulescent, stoloniferous, 4–12 cm; stolons green, often rooting at nodes and forming leafy rosettes; rooted rosettes often develop into erect, rhizomatous caudex from which new stolons are produced; rhizome thick, fleshy. | Plants perennial, caulescent, not stoloniferous, 2–27 cm. |
Stems | 1–6, ascending to erect, leafy proximally and distally, ca. 1/2 subterranean, puberulent, on caudex from usually vertical, subligneous rhizome. |
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Leaves | 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: 1–6; stipules adnate to petiole, forming 2 linear-lanceolate wings, margins entire, apex of each wing free, acute, few-toothed or lobed; petiole 2–17 cm, glabrous or minutely puberulent; blade lanceolate, ovate, or elliptic, 1–9 × 0.6–2.5 cm, base attenuate, margins entire or serrulate, sometimes sinuate, ciliate, apex acute to obtuse, mucronulate, surfaces glabrous or puberulent; cauline similar to basal except: stipules adnate to or free from petiole, linear to linear-lanceolate or linear-oblong, sometimes leaflike, margins usually entire, rarely laciniate or glandular, apex acute to acuminate; petiole 2–7 cm; blade 1.4–7.2(–10) × 1.1–2.3 cm, length 1.3–4.4 times width, apex acute. |
Peduncles | 4–15 cm, puberulent. |
3–13 cm, glabrous or puberulent. |
Flowers | 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 linear-lanceolate, margins eciliate, auricles 0.5–1 mm; petals deep lemon-yellow adaxially or on both surfaces, upper 2 often brownish purple abaxially, lower 3 dark brown- to brownish purple-veined, lateral 2 sparsely bearded, lowest 6–13 mm, spur yellow, gibbous, 0.5–1.5 mm; style head bearded; cleistogamous flowers axillary. |
Capsules | sometimes purple-flecked, ovoid, 5–8 mm, puberulent. |
subglobose to ovoid, 4–10 mm, usually glabrous, rarely finely puberulent. |
Seeds | brown, 3–4 mm. |
medium brown, 2–3.2 mm, elaiosome extending over 1/3 length of seed and completely covering funiculus. |
2n | = 20. |
= 24. |
Viola odorata |
Viola nuttallii |
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Phenology | Flowering Jan–May. | Flowering Apr–Jun. |
Habitat | Lawns, roadsides, clearings, riparian habitats, parks, urban areas | Sagebrush flats, prairie grasslands, dry stream banks, juniper woodlands, scree slopes |
Elevation | 0–1700 m (0–5600 ft) | 400–2600 m (1300–8500 ft) |
Distribution |
CA; CT; ID; IL; MA; ME; MI; NC; NY; OH; OR; PA; RI; UT; WA; WI; BC; NS; ON; QC; Eurasia [Introduced in North America; introduced also in Australia]
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AZ; CO; ID; KS; MN; MT; ND; NE; NM; SD; UT; WY; AB; MB; SK
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Discussion | 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.) |
D. M. Fabijan et al. (1987) stated that Viola nuttallii showed no evidence of hybridization even when growing with V. vallicola east of the Rocky Mountains. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 140. | FNA vol. 6, p. 140. |
Parent taxa | Violaceae > Viola | Violaceae > Viola |
Sibling taxa | ||
Synonyms | Crocion nuttallii | |
Name authority | Linnaeus: Sp. Pl. 2: 934. (1753) | Pursh: Fl. Amer. Sept. 1: 174. (1813) |
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