Gray's Broomrape: Aphyllon californicum ssp. grayanum (Synonyms: Orobanche californica ssp. grayana, Orobanche californica var. grayana, Orobanche grayana, Orobanche grayana var. grayana) -
Bedstraw Broomrape: Aphyllon epigalium ssp. epigalium
Clustered Broomrape: Aphyllon fasciculatum (Synonyms: Anoplanthus fasciculatus, Orobanche fasciculata, Orobanche fasciculata var. fasciculata, Orobanche fasciculata var. lutea, Orobanche fasciculata var. lutea, Orobanche fasciculata var. subulata, Orobanche fasciculata var. typica, Thalesia fasciculata, Thalesia lutea) - Flowers generally 5-20 per stem. Developed flowers at about the same height. Corolla pink to pale or deep reddish pink. Corolla lobes rounded. Corolla tube usually bent 45 degrees or more from vertical, but rarely as little as 25 degrees. Parasitic only on Artemisia sp.
Clustered Broomrape: Aphyllon franciscanum (Synonym: Orobanche fasciculata var. franciscana) - Flowers generally 5-20 per stem. Fully developed flowers at different heights in inflorescence. Plants pale yellow to lemmon-yellow or purple. Outer surface of corolla sometimes tinged purple or brown. Corolla lobe apex pointed. Corolla tube erect or slightly bent (usually less than 45 degrees from vertical.). Parasitic on numerous hosts, but not on Artemisia sp..
Conifer Broomrape, Ocean Spray Broomrape, Pine Broomrape, Pinewoods Broomrape: Aphyllon pinorum (Synonyms: Myzorrhiza pinorum, Orobanche pinorum, Phelipaea pinorum) -
Naked Broomrape, One-flowered Broomrape, Purple Broomrape: Aphyllon purpureum (Synonyms: Aphyllon uniflorum, Orobanche porpyrantha, Orobanche purpurea, Orobanche sedii, Orobanche terrae-novae, Orobanche uniflora, Orobanche uniflora ssp. occidentalis, Orobanche uniflora var. minuta, Orobanche uniflora var. occidentalis, Orobanche uniflora var. purpurea, Orobanche uniflora var. sedi, Orobanche uniflora var. sedii, Orobanche uniflora var. terrae-novae, Orobanche uniflora var. typica, Thalesia uniflora) -
Clover Broomrape, Hellroot: Orobanche minor (Synonym: Orobanche columbiana) -