Viola lobata |
Viola orbiculata |
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moose horn violet, pine violet, yellow wood violet |
darkwoods violet, evergreen yellow violet, round-leaf or round-leaf wood or western round-leaf or evergreen violet, round-leaf violet, violette orbiculaire |
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Habit | Plants perennial, caulescent, not stoloniferous, 5–46 cm. | Plants perennial, caulescent, not stoloniferous, 5–9 cm. | ||||
Stems | 1–3, erect, leafless proximally, leafy distally, glabrous or puberulent, from subligneous rhizome. |
1–5, prostrate or erect, leafy proximally and distally, usually glabrous, from current and/or previous year’s growth, on usually vertical, fleshy rhizome. |
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Leaves | basal and cauline; basal: 0–2, unlobed or palmately 3–11-lobed; stipules ovate to lanceolate, margins ± entire or serrate, apex acute; petiole 5–27 cm, glabrous or puberulent; blade sometimes glaucous, deltate to reniform, 3.5–8.5 × 4.5–13.5 cm, base cordate, truncate, or attenuate, margins on unlobed leaves coarsely dentate-serrate, margins on lobed leaves usually entire, sometimes few-toothed, ciliate (sometimes only proximal 1/2) or eciliate, apex acute to obtuse, mucronulate, surfaces glabrous or puberulent; cauline similar to basal except: distal on naked stems, unlobed and divided leaves can occur on same plant, if divided, palmately 3–12-lobed; stipules sometimes large and ± leaflike, margins entire, lacerate, or laciniate, sometimes with gland-tipped projections, apex acute to acuminate; petiole 0.2–8.8 cm; blade reniform to reniform-cordate, ± ovate, deltate, or rhombic, 1.5–5.5 × 1.4–10 cm, base cordate, subcordate, truncate, or attenuate, margins entire, crenate-serrate, or dentate, or coarsely lacerate to deeply serrate, often entire distally, ciliate or rarely eciliate, apex acute to obtuse, often long-tapered, mucronulate. |
basal and cauline; basal: 3–11; stipules deltate to lanceolate, margins entire, apex acute to acuminate; petiole 2.1–10.5 cm, glabrous or pubescent; blade usually orbiculate to broadly ovate, sometimes reniform, 1.4–5.3 × 1.4–5.3 cm, base cordate, margins crenate to serrulate-crenulate, eciliate or sparingly ciliate, apex usually obtuse, rarely acute, abaxial surface usually glabrous, adaxial surface sparsely pubescent; cauline similar to basal except: stipules lanceolate to ovate, margins usually entire, ciliate; petiole 0.7–1 cm, glabrous or pubescent; blade 1.2–2 × 1.1–1.4 cm. |
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Peduncles | 2–13 cm, glabrous or pubescent. |
2.7–5.6 cm, glabrous. |
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Flowers | sepals lanceolate, margins ciliate or eciliate, auricles 0.1–1 mm; petals deep lemon-yellow adaxially, usually upper 2 and sometimes lateral 2 brownish purple abaxially, lower 3 and sometimes upper 2 brownish purple-veined basally, lateral 2 bearded, lowest 8–19 mm, spur yellow to greenish, gibbous, 0.5–2 mm; style head bearded; cleistogamous flowers axillary. |
sepals narrow to broadly lanceolate, margins eciliate, auricles 0.5–1.5 mm; upper 2 and lateral 2 petals deep lemon-yellow on both surfaces, lower 3 and sometimes upper 2 brownish purple-veined, lateral 2 usually bearded, lowest 8–17 mm, spur usually yellow, sometimes whitish, gibbous, 1.5–2.5 mm; style head bearded; cleistogamous flowers axillary. |
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Capsules | ellipsoid-ovoid, 6–16 mm, glabrous. |
ellipsoid, 6–8 mm, glabrous. |
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Seeds | light brown, blotched or streaked with brown, shiny, 2.1–2.7 mm. |
light to dark brown, sometimes mottled with white, 2–2.3 mm. |
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2n | = 12. |
= 24. |
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Viola lobata |
Viola orbiculata |
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Phenology | Flowering May–Aug. | |||||
Habitat | Alpine and montane slopes, moist montane coniferous forests, canyons, meadows, lake margins | |||||
Elevation | 700–1700 m (2300–5600 ft) | |||||
Distribution |
CA; OR; nw Mexico
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ID; MT; OR; WA; WY; AB; BC
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Discussion | Varieties 2 (2 in the flora). V. B. Baird (1942) noted that Viola lobata was more closely related to V. tripartita than to any western Viola. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
During winter, the basal leaves of Viola orbiculata are appressed to the ground under the weight of snow. The leaves overwinter and are often partly or entirely green after the snow has melted. Mature plants possess 3–11 basal leaves, some derived from previous years and others from the current year’s growth. Occasional plants are found with short, thin stems rooted at the tip and producing a rosette of leaves and stems, showing the close relationship with V. sempervirens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 6, p. 137. | FNA vol. 6, p. 141. | ||||
Parent taxa | Violaceae > Viola | Violaceae > Viola | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | V. sarmentosa var. orbiculata, V. sempervirens var. orbiculata | |||||
Name authority | Bentham: Pl. Hartw., 298. (1849) | (A. Gary) Geyer ex B. D. Jackson: in B. D. Jackson et al., Index Kew. 2(4): 1208. (1895) | ||||
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