|University of California, Berkeley|
|Jepson eFlora: Taxon page
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Index to accepted names and synonyms:
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|Family: Violaceae||View Description||Dichotomous Key|
|Genus: Viola||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Viola hallii A. Gray
Habit: Perennial herb 5--22 cm, glabrous or leaf veins, leaf margins, sepals generally ciliate, stipules occasionally ciliate. Stem: decumbent to erect, generally several, up to 1/2 subterranean, clustered on deep caudex. Leaf: ternate-compound; basal 2--4 per caudex, petiole 5--8 cm, blade 2.8--6 cm, to 2.6--6.5 cm wide, ovate to deltate, fleshy, leaflets dissected into several narrowly elliptic, lanceolate, or oblanceolate segments 1--7 mm wide, tip acute; cauline petiole 1.3--6 cm, blade 2--4.8 cm, 1.2--5.5 cm wide, +- like basal. Inflorescence: axillary; peduncle 2.5--11 cm. Flower: sepals ovate to lanceolate; upper 2 petals dark red-violet, +- black abaxially, lower 3 pale yellow, cream, or +- white, deep yellow to orange basally, veined dark violet, lateral 2 bearded with club-shaped hairs, lowest 5--18 mm; cleistogamous flowers 0. Fruit: 4--12 mm, elliptic, glabrous. Seed: +- 3.5 mm, shiny, pale brown. Chromosomes: 2n=60,72.
Ecology: Vernally moist areas, open forest, grassy hills, flats, chaparral, often serpentine or gravelly soil; Elevation: 150--2100 m. Bioregional Distribution: NW; Distribution Outside California: southwestern Oregon. Flowering Time: Apr--Jul
eFlora Treatment Author: R. John Little
Jepson Online Interchange
Previous taxon: Viola glabella
Next taxon: Viola howellii
Citation for this treatment: R. John Little 2016. Viola hallii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=48216, accessed on July 28, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on July 28, 2016.