Downy Paintedcup
Castilleja sessiliflora
- Native to:
- Canada, Mexico, United States
iNaturalist: © aidancampos (iNaturalist #203380802)






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Orobanchaceae
- Genus:
- Castilleja
- Species:
- Castilleja sessiliflora
- USDA Symbol:
- CASE5
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb , Subshrub
- Height:
- 30 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- High
- Bloom Months:
- apr,may,jun,jul
- Bloom Colors:
- yellow, pink, cream
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Butterflies & Moths:
- ★☆☆☆☆ Documented Lepidoptera association (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
Grammia nevadensis, Grammia oithona
Garden & Ecology Notes
- Wildlife Value:
- hummingbirds, bees, butterflies
- Deer Resistant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts from perennial rootstock following fire; responds positively to prairie burns which reduce competing vegetation.
Soil Requirements
- Soil Type:
- sandy, well-drained, nutrient-poor soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- adapted to prairie and open woodland habitats
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–90 days
- Germination Time:
- 14–60 days
- Notes:
- Hemiparasitic; requires host plant roots for successful establishment. Seeds benefit from cold stratification and light for germination.
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI