|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual, perennial herb, [small shrub, tree, vine], from caudices, taproots, rhizomes, or stolons; hairs 0 or simple. Stem: 0 or prostrate to erect. Leaf: basal, cauline, or both, alternate, [opposite], simple to compound, petioled; stipules generally small; blade linear to round, entire to toothed or lobed. Inflorescence: flowers 1 [raceme], axillary or scapose; peduncle bractlets 2, generally alternate. Flower: bisexual, bilateral [radial]; sepals 5, free, basal lobes present , generally not prominent; petals 5, free, lowest often largest, base ± elongated into a spur; stamens 5, alternate petals, filaments short, wide, with large in-pointing hairs, lowest 2 anthers with basal nectaries extending into petal spur; ovary superior, chamber 1, placentas parietal, 3, ovules  generally many, style 1, often enlarged distally, stigma often oblique or hooked, hairy or not. Fruit: capsule [berry], 3-valved, loculicidal, explosively dehiscent or not. Seed: generally with outgrowth, attractive to ants.
23 genera, 830 species: worldwide, generally temperate, tropics (especially higher elevations). [Munzinger & Ballard 2003 Syst Bot 28:345–351] Lengths of lowest petal including spur. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Baird, V.B. 1942. Wild violets of North Am. University of California Press, Berkeley. Beattie, A. J. and N. Lyons. 1975. Seed dispersal in Viola (Violaceae):adaptations and strategies. Amer. J. Bot. 62: 714–722. Brainerd, E. 1921. Violets of North Am. Vermont Agric. Exp. Sta. Bull. 224. Brizicky, G.K. 1961. The genera of Violaceae in the southeastern United States. J. Arnold Arbor. 42: 321–333. Clausen, J. 1929. Chromosome number and relationship of some North American species of Viola. Annals of Botany. 43: 741–764. Clausen, J. 1964. Cytotaxonomy and distributional ecology of western North American violets. Madroño 17:173–197. Gershoy, A. 1928. Studies in North American violets. I. General considerations. Vermont Agric. Exp. Sta. Bull. 279.]
Leaf: generally deciduous. Flower: sepals ± equal, entire; petals unequal, lowest generally largest, with spur generally < 3  mm, lateral 2 equal, generally spreading, upper 2 equal, erect or reflexed, overlapped or not, lateral 2 generally, others sometimes with beard of variously shaped hairs basally; cleistogamous flowers generally present, petals 0. Fruit: ovoid to oblong, hairy or not. Seed: 8–75.Key to Viola
± 500 species: temperate, worldwide, Hawaii, Andes. (Latin: classical name) Important orns including Viola odorata, Viola tricolor L. (Johnny-jump-up, wild pansy), Viola ×wittrockiana Gams (garden pansy).
Unabridged references: [Baker, M.S. 1949a. Studies in western violets. IV. Leafl. West. Bot. 5: 141–147; Baker, M.S. 1949b. Studies in western violets. VI; Madroño 10: 110–128; Baker, M.S. 1957. Brittonia 9: 217–230; Ballard, H.E. 1992. Systematics of Viola Section Viola in North Am north of Mexico. M.S. thesis, Central Michigan University, Mt. Pleasant, Michigan; Ballard, H.E. 1994. Violets of Michigan. Michigan Botanist 33: 131–199; Davidse, G. 1976. A study of some Intermountain violets (Viola Sect. Chamaemelanium). Madroño 23: 274–283; Fabijan et al. 1987. The taxonomy of the Viola nuttallii complex. Can. J. Bot. 65: 2562–2580; Gil-Ad, N.L. 1995. Systematics and evolution of Viola L. subsection Boreali Americanae (W. Becker) Brizicky. Ph.D. dissertation, Univ of Michigan, Ann Arbor, Michigan; Gil-Ad, N.L. 1997. Systematics of Viola subsection Boreali-Americanae. Boissiera 53: 1–130; Hitchcock, C.L. 1961. Vasc. Plant. Pacific NorthW. Vol. 3; McKinney, L.E. 1992. A taxonomic revision of the acaulescent blue violets (Viola) of North Am. Sida Botanical Miscellany, 7: 1–59; McKinney, L.E. and N. Russell. 2002. Violaceae of the Southeastern United States. Castanea 4: 369–379; Russell, N.H. 1965. Violets (Viola) of the central and eastern United States: an introductory survey. Sida 1: 1–113]
Perennial herb. Stem: prostrate to erect, generally several, clustered on 1–several subterranean caudices from woody rhizome. Leaf: simple, base tapered or truncate to cordate, often oblique; basal 1–6 per caudex, stipule oblong, fused to, forming 2 membranous wings on petiole, entire or few-toothed, the tip of each wing free, deltate or lanceolate, generally fringed, blade 0.8–5.3 cm, 0.4–4.1 cm wide, lanceolate to round; cauline petiole 0.3–12.3 cm, blade 0.3–4.8 cm, 0.3–5 cm wide, ovate, oblong, elliptic, triangular, diamond-shaped or lanceolate, crenate, serrate or dentate with 3–4(5) prominent pointed or rounded lobes per side, shallowly dentate, sharp angled, or entire, occasionally wavy. Inflorescence: axillary; peduncle 1–17 cm. Flower: sepals lanceolate, ciliate or not; petals deep lemon-yellow, upper 2, sometimes lateral 2 red- to purple-brown abaxially, lower 3 veined dark brown, lateral 2 bearded with club-shaped hairs, lowest petal 6–16 mm. Fruit: 4–12 mm, ovoid to ± spheric, puberulent. Seed: 2.1–3.1 mm, light to dark brown or gray, mottled brown.
2n=12,24. Subspecies variable, intergrade, need study; no additional subspecies. [Online Interchange]
Unabridged note: Subspecies variable, intergrade, need study; no additional subspecies; plants in shade often produce larger leaves, longer stems.
Plant 4–25(34.5) cm, puberulent. Stem: generally not buried, spreading to erect, generally elongated by end of season. Leaf: basal petiole 1.9–9.5 cm, blade 1–5.3 cm, 1–3.5 cm wide, ovate to round, ± unlobed, irregularly wavy-dentate, generally gray-green, occasionally purple-tinted abaxially, base tapered to truncate or ± cordate, tip obtuse; cauline petiole 1.3–5.3 cm, blade 1.4–2.2 cm, 0.8–1.3 cm wide, lanceolate to diamond-shaped, crenate-serrate, base generally tapered, tip acute. Inflorescence: peduncle 2.7–17 cm. Flower: lowest petal 10–16 mm. Fruit: 8–12 mm.
2n=24. Dry, grassy or brushy slopes, chaparral, generally below yellow-pine forest; 304–1981 m. Northwestern California, Cascade Range, Sierra Nevada, Central Western California, Southwestern California, Modoc Plateau; southwestern Oregon. Fresh material (light gray) ± needed to distinguish from Viola purpurea subsp. purpurea (dull to bright green tinted ± purple); perhaps better treated as a separate sp. Feb–Jul [Online Interchange]
Previous taxon: Viola purpurea subsp. purpurea
Next taxon: Viola purpurea subsp. venosa
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 15 2014
Citation for this treatment: [Author of taxon treatment] 2013. Viola, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=53410, accessed on Sep 15 2014
Copyright © 2014 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|Viola purpurea subsp. quercetorum|
See CalPhotos for additional images
Beatrice F. Howitt © 1999 California Academy of Sciences
|Geographic subdivisions indicated for the distribution of Viola purpurea subsp. quercetorum|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month