1. Forma Ptilota californica f. typica E.S.Sinova, 1922 accepted as Ptilota californica Ruprecht ex Harvey, 1853 accepted as Ptilota densa C.Agardh, 1822 (synonym)
2. Variety Ptilota californica var. concinna Harvey, 1853 accepted as Ptilota filicina J.Agardh, 1876
3. Forma Ptilota californica f. gracilis E.S.Sinova, 1922 (uncertain, uncertain taxonomic status subjected to verification)
4. Forma Ptilota californica f. media E.S.Sinova, 1922 (uncertain, uncertain taxonomic status subjected to verification)
5. Forma Ptilota californica f. pulchra E.S.Sinova, 1922 (uncertain, uncertain taxonomic status subjected to verification)
6. Forma Ptilota californica f. robusta E.S.Sinova, 1922 (uncertain, uncertain taxonomic status subjected to verification)

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