Castilleja flava var. rustica

(Piper) N. H. Holmgren

in A. Cronquist et al., Intermount. Fl. 4: 484. 1984.

Common names: Rustic or rural paintbrush
Basionym: Castilleja rustica Piper Bull. Torrey Bot. Club 27: 398. 1900
Treatment appears in FNA Volume 17. Treatment on page 608. Mentioned on page 596, 605.

Leaves 3–5(–7)-lobed. Bracts distally pale to bright yellow or light orange, light red, or bright red; lobes short. Calyces proximally pinkish, purplish, or green, distally dull green or colored as bract lobes, 11–25 mm; abaxial and adaxial clefts (6–)7–13(–17) mm, 50–60(–95)% of calyx length, subequal, lateral 0.5–7 mm, 4–30% of calyx length; lobes linear or narrowly to broadly triangular. Corollas 15–27 mm; beak 5–8(–9.5) mm; abaxial lip (1.5–)2–3.5 mm.

Phenology: Flowering Jun–Aug.
Habitat: Mostly montane.
Elevation: 1100–2300 m.


Variety rustica is almost always closely associated with Artemisia tridentata, which is very likely its primary host species. It is found in central Idaho, Montana, and northeastern Oregon. Reports of var. rustica from British Columbia are referred to Castilleja cervina. Apparent hybrids between this variety and C. chromosa are known from Custer County, Idaho.

Selected References


Lower Taxa

J. Mark Egger +, Peter F. Zika +, Barbara L. Wilson +, Richard E. Brainerd +  and Nick Otting +
(Piper) N. H. Holmgren +
Castilleja rustica +
Rustic or rural paintbrush +
Idaho +, Mont. +  and Oreg. +
1100–2300 m. +
Mostly montane. +
Flowering Jun–Aug. +
in A. Cronquist et al., Intermount. Fl. +
Illustrated +  and Endemic +
Euchroma +  and Oncorhynchus +
Castilleja flava var. rustica +
Castilleja flava +
variety +