Shaggy Horkelia, Sierra Horkelia: Horkelia congesta ssp. congesta (Synonym: Horkelia congesta var. congesta) -
Josephine Horkelia, Sierra Horkelia: Horkelia congesta ssp. nemorosa (Synonym: Horkelia congesta var. nemorosa) -
Carawayleaf Horkelia, Carrotleaf Horkelia: Horkelia daucifolia (Synonym: Horkelia daucifolia ssp. daucifolia) -
Small-flowered Horkelia: Horkelia fusca ssp. parviflora (Synonyms: Horkelia fusca var. parviflora, Horkelia fusca var. pseudocapitata) -
Henderson's Horkelia: Horkelia hendersonii -
Howell's Horkelia: Horkelia howellii (Synonym: Horkelia sericata, in part)
Silky Horkelia, Howell's Horkelia: Horkelia sericata (Synonym: Horkelia howellii) -
Pale Horkelia: Horkelia tridentata var. flavescens (Synonym: Horkelia tridentata ssp. flavescens)
Clustered Horkelia: Horkelia tridentata ssp. tridentata (Synonym: Horkelia tridentata ssp. tridentata)-