This species is an annual or biennial wildflower with short (20-60cm) finely hairy stems. The common name refers to the flower bracts, which look as if they were dipped in scarlet paint, and are divided into 3 to 5 scarlet-tipped lobes. The actual flowers are a much less conspicuous pale yellow, 17-25mm long, and often at least partially obscured by the scarlet bracts and calyx.

Stems with flowers or fruits are best for identification, though since many populations are small it is better to take a photograph than a specimen.

There are no other species of Castilleja in the state, and our species is distinctive. However, some populations may represent escapes from garden cultivation or roadside seed mixes.