Castilleja exserta is an annual hemiparasitic wildflower in the Orobanche family, grown for its pink-purple paintbrush-like flower spikes. It is a species, not a genus, and it needs living host plants nearby to thrive, so it is best started from seed in sunny, open ground.
Family
Orobanchaceae (Orobanch family)
Grows as
Annual
Light
Full sun
Water
Water lightly while seedlings establish, then let the soil dry between waterings.
Soil
Well-drained, sandy or gravelly soil with low fertility.
Temperature
15–30 °C; tolerates light frost once established.
How easy
Moderate
Edible
Yes, some parts
Native range
California to New Mexico and Mexico (Baja California Norte, Sonora)
Climate
subtropical
About
Castilleja exserta (formerly Orthocarpus purpurascens) is a species of plant in the genus Castilleja which includes the Indian paintbrushes. Its common names include purple owl's clover, escobita, and exserted Indian paintbrush.
This species is native to the Southwestern United States in various habitats of California, Arizona, and New Mexico; and to Northwestern Mexico. It is an introduced species in Hawaii.
Text excerpted from the Wikipedia article Castilleja exserta by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.