Viola hallii
Viola prionantha
Hall's violet, Oregon violet, wild pansy
Japanese violet
1–3, decumbent or ascending to erect, ca. 1/2 subterranean, glabrous, clustered on single, short, vertical, deep-seated caudex.
basal and cauline;
basal: 1–4, palmately compound, ± 2-ternate or 3-ternate, leaflets 3;
stipules adnate to petiole, forming 2 linear-lanceolate wings, unlobed, margins entire, apex of each wing free, acute;
petiole 5–8 cm, glabrous;
blade ovate to deltate, 2.8–6 × 2.6–6.5 cm, ± coriaceous, base tapered, ultimate lobes narrowly elliptic, lanceolate, or oblanceolate, 1–7 mm wide, margins entire, ciliate or eciliate, apex acute, mucronulate, surfaces glabrous;
cauline similar to basal except: stipules usually lanceolate, sometimes broadly ovate, ± leaflike, margins toothed;
petiole 1.3–6 cm;
blade 2–4.8 × 1.2–5.5 cm.
basal, 6–22, ascending to erect;
stipules linear-lanceolate, margins remotely denticulate, apex acuminate;
petiole 1–13 cm, narrowly winged distally, glabrous or puberulent;
blade unlobed, oblong-ovate, ovate-lanceolate, or narrowly ovate, 1–4.5(–10) × 0.6–2(–4) cm, base usually truncate, sometimes ± cordate or broadly cuneate, margins crenulate, ciliate or eciliate, apex obtuse or ± acute, surfaces glabrous or puberulent.
2.5–11 cm, glabrous.
2.5–6 cm, glabrous, bracteoles near middle.
sepals lanceolate to ovate, margins ciliate, auricles 0.5–1 mm;
petals: upper 2 almost black abaxially, dark reddish violet adaxially, lower 3 pale yellow, cream, or ± white, lateral 2 bearded, with deep yellow to orange patch basally, dark reddish violet-veined, lowest with deep yellow to orange patch basally, dark reddish violet-veined, 5–18 mm, spur yellow, gibbous, 0.5–2 mm;
style head bearded; cleistogamous flowers absent.
sepals lanceolate or ovate-lanceolate, margins ciliate or eciliate, auricles 1–2 mm;
petals light violet or purple on both surfaces, rarely all white, lower 3 dark violet-veined, lateral 2 beardless or sparsely bearded, lowest 14–25 mm, spur pale to dark violet, elongated, 6–9 mm, tip hooked up;
style head beardless; cleistogamous flowers present.
ellipsoid, 4–12 mm, glabrous.
narrowly ellipsoid, 5–12 mm, glabrous.
light brown, shiny, 3.2–3.5 mm.
dark brown, ca. 2 mm.
= 60, 72.
= 48.
Viola hallii
Viola prionantha
Viola hallii was discovered on the grounds of Willamette University in Salem, Oregon, by Elihu Hall, a professor at that institution (V. B. Baird 1942). Leaves of V. hallii are similar to V. beckwithii.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
In 1952, plants of Viola initially identified as V. patrinii were collected and reported by C. T. Rogerson to be established in lawns on the campus of Kansas State University, Manhattan, Kansas, where they are still found. S. B. Rolfsmeier recently determined that these plants are V. prionantha. R. B. Kaul reported that V. prionantha occurs along roadsides in Kansas and is also established in the floodplain of the North Platte River in Nebraska, where it was first collected by him in 1992.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
KS Wildflowers
