Castilleja campestris var. campestris
Herbs (0.3–)1–3 dm. Leaves linear, thin, flexible, 0.8–4 cm. Inflorescences: bracts linear, shorter than or ± equal to flowers. Calyces 7–11 mm; abaxial and adaxial clefts 3–6 mm, 45–75% of calyx length. Corollas light to bright yellow, 14–26 mm; tube 13–22 mm. Anthers: proximal pollen sac to 1/3 length of distal.
Phenology: Flowering (Mar–)Apr–Jul(–Aug).
Habitat: Vernal pools, moist ground.
Elevation: 0–2100 m.
Variety campestris is widespread from central California to east-central Oregon, but much of its vernal pool and wet meadow habitat has been lost to agricultural development.