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Vascular Plants of California
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Viola lobata subsp. integrifolia

Higher Taxonomy
Family: ViolaceaeView Description 
Habit: 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 [0], 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 [1] 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.
Genera In Family: 23 genera, 830 species: worldwide, generally temperate, tropics (especially higher elevations). Note: Lengths of lowest petal including spur.
eFlora Treatment Author: R. John Little
Scientific Editor: Thomas J. Rosatti.
Genus: ViolaView DescriptionDichotomous Key

Common Name: VIOLET
Leaf: generally deciduous. Flower: sepals +- equal, entire; petals unequal, lowest generally largest, with spur generally < 3 [20] 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.
Species In Genus: +- 500 species: temperate, worldwide, Hawaii, Andes. Etymology: (Latin: classical name) Note: Important orns including Viola odorata, Viola tricolor L. (Johnny-jump-up, wild pansy), Viola ×wittrockiana Gams (garden pansy).
Unabridged Reference: 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; Gil-ad, N.L. 1998. The micromorphologies of seed coats and petal trichomes of the taxa of Viola subsect. Boreali-Americanae (Violaceae) and their utility in discerning orthospecies from hybrids. Brittonia 50: 91--121; Hitchcock, C.L. 1961. Vasc. Pl. 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
Species: Viola lobataView Description 

Habit: Perennial herb 5--46 cm, glabrous or puberulent, glaucous or not. Stem: erect, 1--3, generally purple, leafless proximally, from thick, shallow or deep, horizontal or vertical rhizome. Leaf: simple, deeply divided or not; basal 0--2 per caudex, petiole 5--24 cm, blade 3.5--8.5 cm, 4.5--13.5 cm wide, deltate to reniform, entire to irregularly serrate, ciliate, base cordate, wedge-shaped, or truncate, tip blunt, obtuse, or acute; cauline only near stem tip, petiole 0.2--7.4 cm, blade 1.5--5.5 cm, 1.4--10 cm wide, reniform, deltate, +- ovate, or diamond-shaped, base cordate, wedge-shaped, or truncate, entire to coarsely toothed, tip acute to obtuse. Inflorescence: axillary from upper leaf axils; peduncle 2--13 cm. Flower: sepals lanceolate, generally ciliate; petals deep lemon-yellow, generally upper 2, sometimes lateral 2 dark red-brown abaxially, lower 3, sometimes upper 2 veined brown-purple basally, lateral 2 bearded with cylindric hairs, lowest 8--19 mm. Fruit: 6--16 mm, elliptic-ovate, glabrous. Seed: 2.1--2.7 mm, shiny, pale brown, blotched or streaked with brown. Chromosomes: 2n=12.

Viola lobata subsp. integrifolia (S. Watson) R.J. Little
Leaf: cauline blade generally longer than wide, diamond-shaped, reniform-cordate, or generally deltate, proximally serrate to dentate, distally often entire, tip acute.
Ecology: Uncommon. Dry shaded or open forest, chaparral, often on serpentine; Elevation: 450--2070 m. Bioregional Distribution: NW, CaR, SN, PR; Distribution Outside California: southwestern Oregon. Flowering Time: Mar--Jul
Jepson eFlora Author: R. John Little
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

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Botanical illustration including Viola lobata subsp. integrifolia

botanical illustration including Viola lobata subsp. integrifolia


Citation for this treatment: R. John Little 2012, Viola lobata subsp. integrifolia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 18, 2021.

Citation for the whole project: Jepson Flora Project (eds.) 2021, Jepson eFlora,, accessed on April 18, 2021.

Viola lobata subsp. integrifolia
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© 2016 Keir Morse
Viola lobata subsp. integrifolia
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© 2008 Steve Matson
Viola lobata subsp. integrifolia
click for enlargement
© 2008 Keir Morse
Viola lobata subsp. integrifolia
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© 2017 Barry Rice
Viola lobata subsp. integrifolia
click for enlargement
© 2008 Steve Matson
Viola lobata subsp. integrifolia
click for enlargement
© 2008 Steve Matson

More photos of Viola lobata subsp. integrifolia in CalPhotos

Geographic subdivisions for Viola lobata subsp. integrifolia:
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map of distribution 1
(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).


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Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).