Castilleja affinis var. neglecta
Phytologia 90: 66. 2008.
Stems: hairs dense, sometimes sparse, unbranched, rarely branched. Leaves not fleshy. Inflorescences 1.5–2.5 cm wide; bracts proximally pale yellow or yellow-green, distally yellow, rarely pink or pale red-orange, often becoming reddish tinted after anthesis, 3-lobed. Calyces green proximally, yellow in outer 1/2, after anthesis often whitish or reddish distally, 14–20 mm. Corollas 17–25 mm; beak subequal to or slightly exserted from calyx, 7–11 mm.
Phenology: Flowering Mar–Jul.
Habitat: Serpentine meadows and slopes.
Elevation: 0–300 m.
Variety neglecta is endemic to Marin, Napa, and Santa Clara counties. Its habitat is threatened by urbanization and recreational uses. Within its limited range, it is the only representative of Castilleja affinis on serpentine substrates and is recognized by its relatively narrow, yellow inflorescences.