Cows Clover
Trifolium wormskioldii
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Fabaceae
- Genus:
- Trifolium
- Species:
- Trifolium wormskioldii
Growth Characteristics
- Life Cycle:
- Annual | Perennial
- Growth Habit:
- Forb/herb
- Height:
- 1-2 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- may, sep
- Bloom Colors:
- pink, purple
Native Range
United States: Alaska, Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Texas, Utah, Washington, Wyoming, Canada: British Columbia
Keystone Species Ranking
- Bee Keystone:
- ★★★★☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)
Host Plant for Caterpillars
Grapholita conversana, Greenish Blue (Plebejus saepiolus), Orange Sulphur (Colias eurytheme), western cloudywing (Thorybes diversus)
Reported Fauna Sightings
Bees: Obscure bumble bee (Bombus caliginosus), Obscure bumble bee (Bombus caliginosus), Two-form bumble bee (Bombus bifarius), Two-form bumble bee (Bombus bifarius), van Dyke bumble bee (Bombus vandykei), van Dyke bumble bee (Bombus vandykei), Yellow bumble bee (Bombus fervidus), Yellow bumble bee (Bombus fervidus), Yellow-faced bumble bee (Bombus vosnesenskii), Yellow-faced bumble bee (Bombus vosnesenskii)
Soil Requirements
- Soil Type:
- rich, moisture-retentive loamy soil
- pH:
- 5.5 - 7.5 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- Commonly found in wet meadows and along streambanks.
Germination Information
Pre-treatment: None required
Establishment: Seeds germinate at a higher percentage when placed directly into a warm growth box of 75°F compared to a cooler of 35°F
Source: npn.rngr.net