Hookedspur Violet
Viola adunca
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Violaceae
- Genus:
- Viola
- Species:
- Viola adunca
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 1-2 ft
- Light Requirements:
- Shade
- Drought Tolerance:
- High
- Bloom Months:
- apr, may, jun, jul, aug
- Bloom Colors:
- Blue, Purple
- Ground Cover:
- Yes
- Lawn Substitute:
- Yes
Native Range
United States: Alaska, Arizona, California, Colorado, Iowa, Idaho, Massachusetts, Maine, Michigan, Minnesota, Montana, North Dakota, New Hampshire, New Mexico, Nevada, New York, Oregon, South Dakota, Utah, Vermont, Washington, Wisconsin, Wyoming, Canada: Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Northwest Territories, Nunavut, Ontario, Quebec, Saskatchewan, Yukon
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★☆☆ Based on number of butterfly and moth species using this genus as host plant (Source: National Wildlife Federation)
- Bee Keystone:
- ★☆☆☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Host Plant for Caterpillars
Atlantis fritillary (Speyeria atlantis), ⚠️Bog Fritillary (Clossiana eunomia), Edwards' fritillary (Speyeria edwardsii), Great Basin fritillary (Speyeria egleis), Great Spangled Fritillary (Speyeria cybele), Hydaspe fritillary (Speyeria hydaspe), Mormon fritillary (Speyeria mormonia), Titania's fritillary (Clossiana titania), 🛑Zerene fritillary (Speyeria zerene)
Reported Fauna Sightings
Bees: Fuzzy-horned bumble bee (Bombus mixtus), Fuzzy-horned bumble bee (Bombus mixtus)
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- consistently moist
- Notes:
- prefers open woods and meadows
Germination Information
Pre-treatment: 120 days of cool (38F)/moist stratification
Source: npn.rngr.net