|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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 howellii A. Gray
Habit: Perennial herb 2--44 cm, glabrous to sparsely hairy. Stem: prostrate to erect, 1--4, not woody at base, often much elongated by season end, clustered on 1--3 caudices generally at ground level, from woody rhizome. Leaf: simple; basal 1--6 per caudex, petiole 4--15 cm, blade 1.9--6.8 cm, 2.1--6.4 cm wide, ovate to reniform, thin, crenate, base cordate, tip acute to generally obtuse; cauline petiole 1--4.5 cm, blade 2--5.1 cm, 1.2--5.8 cm wide, +- like basal. Inflorescence: axillary; peduncle 2.8--14 cm. Flower: sepals lanceolate, ciliate or not; petals violet to soft blue-violet, +- white at base to +- white, lower 3 veined dark violet, lateral 2 densely bearded with cylindric hairs, lowest 14--23 mm, spur 2.4--5 mm, +- as long as wide. Fruit: 7--11 mm, elliptic, glabrous. Seed: light brown, 1.5 mm. Chromosomes: 2n=40,80.
Ecology: Moist, shady areas, conifer forest; Elevation: 50--1295 m. Bioregional Distribution: KR (near Joe Bar, Siskiyou Co.); Distribution Outside California: British Columbia, Oregon, Washington. Flowering Time: Apr--Jul
eFlora Treatment Author: R. John Little
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory
Previous taxon: Viola hallii
Next taxon: Viola langsdorffii
Citation for this treatment: R. John Little 2017. Viola howellii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=48222, accessed on April 28, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 28, 2017.