Viola trinervata
Viola lanceolata
3-nerve violet, desert pansy, Rainier or sagebrush or three-nerve violet, Rainier violet, sagebrush violet, three-nerve violet
bog white violet, Howell's violet, lance-leaf or bog white violet, lance-leaf violet, strap-leaf violet, violette lancéolée, white bog violet
1–4, decumbent, ascending, or erect, ca. 1/2 subterranean, glabrous, from single, vertical, deep-seated caudex.
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, 2–6(–9), ascending to erect;
stipules linear-lanceolate, margins entire or irregularly lacerate (at least distally), apex acute;
petiole 2–12 cm, glabrous or pubescent;
blade unlobed, lanceolate or narrowly elliptic to nearly linear, 2.5–12 × 0.7–2.5 cm, longer than wide, base attenuate, margins serrate, mostly eciliate, apex acute, mucronulate, surfaces glabrous.
1.1–7 cm, glabrous.
2–17 cm, usually pubescent.
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 ovate to lanceolate, margins mostly eciliate, auricles 1–2 mm;
petals white on both surfaces, lowest and sometimes lateral 2 purple-veined, lateral 2 sparsely bearded or beardless, lowest 7–12 mm, spur white, gibbous, 1–2 mm;
style head beardless; cleistogamous flowers on prostrate to ascending peduncles.
ovoid, 7–12 mm, glabrous.
ellipsoid, 5–8 mm, glabrous.
tan, 3.2–4.5 mm.
beige to bronze, 1.5–2.5 mm.
= 24.
Viola trinervata
Viola lanceolata
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.)
Viola lanceolata occurs in small colonies; individual plants are interconnected by stolons.
Viola lanceolata subsp. vittata was recognized by N. H. Russell (1955) based on its linear leaf blade shape. The range in leaf blade shape appears to have no distinct line of demarcation. Some believe that leaf shape differences and near restriction to the coastal plain support recognition at some level. Studies are necessary to resolve this issue.
J. H. Shultze (1946) reported that Viola lanceolata was introduced into Washington in the early 1900s primarily from Cape Cod and Wisconsin as a result of importation of cranberry vines. In British Columbia, it is known from Lulu Island, where it was introduced from eastern North America (G. W. Douglas et al. 1998–2002, vol. 5).
Viola lanceolata reportedly hybridizes with V. primulifolia var. primulifolia (= V. ×modesta House) and V. macloskeyi (= V. ×sublanceolata House).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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