Viola trinervata |
Viola affinis |
|
---|---|---|
3-nerve violet, desert pansy, Rainier or sagebrush or three-nerve violet, Rainier violet, sagebrush violet, three-nerve violet |
Le Conte's violet, sand violet, violette affine |
|
Habit | Plants perennial, caulescent, not stoloniferous, 5–15 cm. | Plants perennial, acaulescent, not stoloniferous, 5–15 cm; rhizome slender, becoming thick and fleshy with age. |
Stems | 1–4, decumbent, ascending, or erect, ca. 1/2 subterranean, glabrous, from single, vertical, deep-seated caudex. |
|
Leaves | basal and cauline; basal: 1–7, palmately compound, leaflets 3–5; stipules adnate to petiole, forming 2 linear-lanceolate wings, unlobed, margins entire, apex of each wing free, acute; petiole 4.5–15 cm, glabrous; blade reniform or ovate to ± orbiculate, 2–5 × 2.5–5 cm, coriaceous, base tapered, leaflets cleft or dissected into 2–3 elliptic, lanceolate, or oblanceolate lobes 2–7 mm wide, margins usually entire, eciliate, apex acute, mucronulate, surfaces glabrous (± glaucous), abaxial surface usually with prominent vein parallel to each margin; cauline similar to basal except: stipules lanceolate; petiole 1–5.5 cm; blade 1–3 × 2–4.5 cm. |
basal, 1–6, ascending to erect; stipules lanceolate, margins entire or fimbriate, apex acute; petiole 2–10 cm, glabrous; blade green abaxially, unlobed, narrowly to broadly ovate or narrowly deltate, 1.5–10 × 1.5–10 cm, not fleshy, base cordate to broadly cordate or almost truncate, margins crenate to serrate, ciliate or eciliate, apex acute to obtuse, surfaces sparsely pubescent adaxially, rarely glabrous. |
Peduncles | 1.1–7 cm, glabrous. |
3–15 cm, glabrous or pubescent. |
Flowers | sepals lanceolate, margins eciliate, auricles 0–1 mm; petals: upper 2 often overlapping, dark reddish violet on both surfaces, lower 3 lilac, rarely white, lateral 2 bearded, with yellow patch basally and reddish violet patch distal to yellow patch, lowest 9–15 mm with yellow patch, dark reddish violet-veined, spur yellow, gibbous, 0.6–1.5 mm; style head bearded; cleistogamous flowers absent. |
sepals lanceolate to ovate, margins ciliate or eciliate, auricles 1–2 mm; petals lavender-violet to dull reddish violet on both surfaces, lower 3 white basally and darker violet-veined, lateral 2 bearded, lowest 10–22 mm, usually obviously bearded, rarely beardless, spur white or same color as petals, gibbous, 2–3 mm; style head beardless; cleistogamous flowers from prostrate to ascending peduncles. |
Capsules | ovoid, 7–12 mm, glabrous. |
often reddish or purplish-flecked or green, ellipsoid, 5–10 mm, glabrous or puberulent. |
Seeds | tan, 3.2–4.5 mm. |
beige, mottled to bronze, 1.5–2.5 mm. |
2n | = 54. |
|
Viola trinervata |
Viola affinis |
|
Phenology | Flowering Mar–May. | Flowering Apr–Jun. |
Habitat | Sagebrush flats, dry, rocky hillsides, usually in gravelly soil | Open or wooded wet areas, meadows, stream banks, thickets, shores of lakes, seasonally dry areas. |
Elevation | 400–1200 m (1300–3900 ft) | 100–2000 m (300–6600 ft) |
Distribution |
OR; WA
|
CT; DC; DE; IL; IN; MA; MD; MI; MN; NH; NJ; NY; OH; PA; RI; VA; VT; WI; WV; ON; QC |
Discussion | In some populations of Viola trinervata the lower three petals are white with a yellow area proximally (V. B. Baird 1942). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
L. E. McKinney (1992) considered Viola affinis, and much of what botanists had called V. nephrophylla, to be essentially the same taxon. After studying additional specimens, reviewing literature (H. E. Ballard 1994; A. Haines 2001b), and discussions with others (J. Cayouette, H. E. Ballard, A. Haines, pers. comm.), he chose to maintain these as separate taxa. Reports of V. affinis in the Gulf coastal states based on specimens or photographs are usually attributable to V. missouriensis. Viola affinis reportedly hybridizes with V. hirsutula (= V. ×consobrina House), V. cucullata (= V. ×consocia House), V. brittoniana (= V. ×davisii House), V. sororia (= V. ×filicetorum Greene [as species]), V. sagittata var. sagittata (= V. ×hollickii House), and V. nephrophylla (= V. ×subaffinis House). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 161. | FNA vol. 6, p. 120. |
Parent taxa | Violaceae > Viola | Violaceae > Viola |
Sibling taxa | ||
Synonyms | V. beckwithii var. trinervata | V. affinis var. subarctica, V. crenulata, V. sororia subsp. affinis, V. sororia var. affinis, V. subviscosa, V. venustula |
Name authority | (Howell) Howell ex A. Gray: Bot. Gaz. 11: 290. (1886) | Leconte: Ann. Lyceum Nat. Hist. New York 2: 138. (1826) |
Web links |