Like some other members of their genus, the plants are hemi-parasitic, using their haustoria to take some, but not all, of the nutrition they require from other plants. The big sagebrush and other plants in the aster family are common hosts. In a study of the parasitization of big sagebrush by desert paintbrush, they were found to get about 10% of their sugar energy from host plants.[12] In controlled experiments, the desert paintbrush – like orange paintbrush (Castilleja integra) and rough paintbrush (Castilleja scabrida) – was tolerant of being without a host species for short periods. Desert paintbrushes are hyperaccumulators of the element selenium.

Plant Data

Names and Taxonomy

  • Common Names: Showy Northwestern Indian-paintbrush, Desert Paintbrush
  • Synonyms: Castilleja chromosa, Castilleja ewanii, Castilleja martinii ssp. ewanii, Castilleja martinii var. ewanii, Castilleja pyramidalis, Castilleja angustifolia var. dubia
  • Family: Orobanchaceae (Broomrape)
  • Genus Information:

Habit and Size

  • Duration: perennial
  • Habit: shrub
  • Shape: upright
  • Size: to 4' (150 cm)
  • Stem: no branching, woody

Leaves

  • Color: green
  • Shape: lancelate
  • Edge: smooth
  • Arrangement: alternate
  • Leaf Retention:

Flowers and Fruit

  • Sex: dioecious
  • Flower Color: yellow, green
  • Flower Size: 1-6" (2.5-5.5 cm)
  • Number of Petals: tube smooth
  • Bloom: May, Jun, Jul, Sept
  • Fruit: capsule 0.4-0.6" (1-1.5 cm)

Habitat and Growing Conditions

  • Water Use: low
  • Light: sunny
  • Soil: hot, dry, sandy soil and rock crevises
  • Habitat: dry scrub, steppe and desert

Distribution

  • Distribution: AZ, CA, CO, ID, MT, NM, NV, OR, UT, WA, WY
  • Seen: Oak creek
  • Elevation: 1000-3000' ( m)

Photographs

Desert Paintbrush (Castilleja chromosa)

Seen at Oak Creek, NV

Desert Paintbrush (Castilleja chromosa) Seedpods

Seen at Oak Creek, NV

Desert Paintbrush (Castilleja chromosa) Seedpods

Seen at Oak Creek, NV