Yellow Evening Primrose
Oenothera flava
Also known as: Murdock's Evening Primrose
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Onagraceae
- Genus:
- Oenothera
- Species:
- Oenothera flava
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 6 in - 1 ft
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- apr, may, jun, jul, aug
- Bloom Colors:
- Yellow
- Ground Cover:
- Yes
Native Range
United States: Utah
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)
Reported Fauna Sightings
Bees: Yellow-faced bumble bee (Bombus vosnesenskii), Yellow-faced bumble bee (Bombus vosnesenskii)
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 8.0 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- native to arid and semi-arid regions
Germination Information
Pre-treatment: Seeds are imbibed in water for 4 hours and undergo a 90 day cold, moist stratification at 1 to 3°C in the refrigerator.
Establishment: Seeds are hand collected in August when capsules begin to split open. Seeds are brown at maturity. They are collected in paper bags and kept in a well ventilated drying shed prior to cleaning.
Source: npn.rngr.net