Viola rotundifolia |
Viola epipsila |
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early yellow or roundleaf yellow violet, round-leaf violet, roundleaf yellow violet, violette à feuilles rondes |
Canada violet, dwarf marsh violet, northern marsh violet |
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Habit | Plants perennial, acaulescent, not stoloniferous, 1–20 cm; rhizome thick, fleshy. | |
Leaves | basal, 2–5, prostrate to ascending, often overlapping basally; stipules linear-lanceolate, margins entire, apex acute; petiole 2–8 cm, pubescent; blade unlobed, orbiculate, reniform, or ovate, 2–12 × 1.5–9 cm, base cordate, margins crenate to serrate, sometimes glandular, ciliate or eciliate, apex rounded to acute, surfaces usually pubescent throughout or concentrated proximally on both surfaces. |
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Peduncles | 1.5–7 cm, usually pubescent. |
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Flowers | sepals lanceolate to ovate, margins ciliate or eciliate, auricles 0.5–1 mm; petals deep lemon-yellow on both surfaces, lower 3 brownish purple-veined, lateral 2 bearded, lowest 8–11 mm, spur yellow, gibbous, 1–2 mm; style head beardless; cleistogamous flowers on prostrate or partially subterranean rhizomes or on racemelike, nonrooting, and usually leafless branches growing from rhizome apex. |
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Capsules | ellipsoid, 5–10 mm, glabrous. |
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Seeds | beige, 1–2 mm. |
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2n | = 12. |
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Viola rotundifolia |
Viola epipsila |
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Phenology | Flowering Mar–May. | |
Habitat | Rich montane forests and other mesic woodlands | |
Elevation | 200–2000 m (700–6600 ft) | |
Distribution |
CT; DE; GA; KY; MA; MD; ME; NC; NH; NY; OH; PA; RI; SC; TN; VA; VT; WV; ON; QC
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AK; CO; MI; AB; BC; MB; NT; NU; ON; YT; Europe; Asia |
Discussion | N. H. Russell (1955b) stated that Viola rotundifolia is a primitive member of Viola and probably one of the ancestral species of stemmed yellow violets of North America. Russell (1965) stated that morphologically, V. rotundifolia is one of the most invariable violets and suggested that its nearest relative is V. orbiculata. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (1 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 155. | FNA vol. 6, p. 130. |
Parent taxa | Violaceae > Viola | Violaceae > Viola |
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Michaux: Fl. Bor.-Amer. 2: 150. (1803) | Ledebour: Index Seminum (Dorpat) 1820: 5. (1820) |
Web links |