Viola rotundifolia |
Viola hastata |
|
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early yellow or roundleaf yellow violet, round-leaf violet, roundleaf yellow violet, violette à feuilles rondes |
halberd-leaf or halberdleaf yellow violet, halberdleaf yellow violet |
|
Habit | Plants perennial, acaulescent, not stoloniferous, 1–20 cm; rhizome thick, fleshy. | Plants perennial, caulescent, not stoloniferous, 5–30 cm. |
Stems | 1(–2), erect, leafless proximally, leafy distally, glabrous or sparsely puberulent, from fleshy rhizome. |
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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. |
basal and cauline; basal: 0–1; stipules ovate to lanceolate, margins laciniate with gland-tipped projections, apex usually acuminate; petiole 3–11.5 cm, usually glabrous; blade sometimes gray-green abaxially, usually mottled light green adaxially, widely or narrowly hastate to ovate, 2.5–4.4 × 1.8–3.2 cm, base hastate to cordate or truncate, margins serrate or crenate, ciliate or eciliate, apex acute, surfaces usually glabrous, sometimes scabrous; cauline similar to basal except: leaves usually restricted to distal ends of naked stems; petiole 1–2.5 cm; blade 2–10 × 1.1–4.5 cm. |
Peduncles | 1.5–7 cm, usually pubescent. |
1–5.3 cm, usually glabrous. |
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. |
sepals lanceolate to ovate, margins mostly eciliate, auricles 0.5–1 mm; petals lemon-yellow usually on both surfaces, lower 3 and sometimes upper 2 brownish purple-veined, lateral 2 bearded, lowest 9.5–12 mm, spur yellow to greenish, gibbous, 0.5–2 mm; style head bearded; cleistogamous flowers axillary. |
Capsules | ellipsoid, 5–10 mm, glabrous. |
ovoid to ellipsoid, 6–8 mm, glabrous. |
Seeds | beige, 1–2 mm. |
beige to bronze, 2–2.5 mm. |
2n | = 12. |
= 12. |
Viola rotundifolia |
Viola hastata |
|
Phenology | Flowering Mar–May. | Flowering late Mar–May. |
Habitat | Rich montane forests and other mesic woodlands | Rich woods, chiefly mountains and piedmont |
Elevation | 200–2000 m (700–6600 ft) | 50–2000 m (200–6600 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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AL; GA; KY; MD; NC; NY; OH; PA; SC; TN; VA; WV
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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.) |
V. B. Baird (1942) commented that Viola hastata is more closely related to V. glabella than to any eastern species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 155. | FNA vol. 6, p. 133. |
Parent taxa | Violaceae > Viola | Violaceae > Viola |
Sibling taxa | ||
Name authority | Michaux: Fl. Bor.-Amer. 2: 150. (1803) | Michaux: Fl. Bor.-Amer. 2: 149. (1803) |
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