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Vascular Plants of California
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Viola pinetorum

MOUNTAIN YELLOW VIOLET


Higher Taxonomy
Family: ViolaceaeView Description 
Common Name: VIOLET FAMILY
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.
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
Viola pinetorum Greene
NATIVE
Habit: Perennial herb 4.5--22 cm, glabrous to puberulent, canescent, or gray-tomentose. Stem: prostrate to erect, generally several, clustered on 1--several subterranean caudices from woody rhizome. Leaf: simple; basal 1--4 per caudex, petiole 2.3--9.5 cm, blade 1.3--5 cm, 0.3--2.5 cm wide, linear to elliptic or ovate to lance-elliptic, or oblanceolate to obovate, thin or not, jagged to irregularly serrate or dentate, occasionally entire, sometimes wavy, base long-tapered or wedge-shaped, tip acute; cauline petiole 0.9--8.3 cm, blade 0.3--1.4 cm wide, +- like basal in shape. Inflorescence: axillary; peduncle 2.9--11.5 cm. Flower: sepals lanceolate, not ciliate; petals deep lemon-yellow, upper 2 red- to purple-brown abaxially, lower 3 veined dark brown, lateral 2 bearded with cylindric hairs, lowest 5--12 mm. Fruit: 3.5--7 mm, ovoid, puberulent. Seed: 2--3.5 mm, medium to dark brown. Chromosomes: 2n=12.

Jepson eFlora Author: R. John Little
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Viola pedunculata
Next taxon: Viola pinetorum subsp. grisea


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Citation for this treatment: R. John Little 2012, Viola pinetorum, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=48274, accessed on October 06, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on October 06, 2024.

Viola pinetorum subsp. grisea
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©2014 Keir Morse
Viola pinetorum subsp. pinetorum
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©2021 Barry Rice
Viola pinetorum subsp. grisea
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©2017 Keir Morse
Viola pinetorum subsp. pinetorum
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©2013 Neal Kramer
Viola pinetorum subsp. grisea
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©2014 Keir Morse

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Geographic subdivisions for Viola pinetorum:
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map of distribution 1

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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.
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CCH collections by month Flowering-Fruiting Monthly Counts

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).