= Chelidonium multifidum Moc. & Sessé ex DC.; Prodr. [A.P. de Candolle] 3: 344 (1828)
= Chryseis caespitosa Torr. & A.Gray; Fl. N. Amer. [Torrey & A.Gray] 1: 63 (1838)
= Chryseis californica (Cham.) Lindl.; Edwards´s Bot. Reg. 23: t. 1948, f. 3 (1837)
= Chryseis compacta Lindl.; Edwards´s Bot. Reg. 23: t. 1948 (1837)
= Chryseis crocea Lindl.; Edwards´s Bot. Reg. 23: t. 1948 (1837)
= Chryseis douglasii Hook. & Arn. ex Torr. & A.Gray; Fl. N. Amer. [Torrey & A.Gray] 1: 664 (1840)
= Chryseis tenuifolia Torr. & A.Gray; Fl. N. Amer. [Torrey & A.Gray] 1: 64 (1838)
= Eschscholzia absinthiifolia Greene; Pittonia 5: 239 (1903)
= Eschscholzia ambigua Greene; Fl. Francisc. (1896) 286, et Man. Bot. San Francisco Bay 11 (1894)
= Eschscholzia angularis Greene; Pittonia 5: 238 (1903)
= Eschscholzia apiculata Greene; Pittonia 5: 235 (1903)
= Eschscholzia arizonica Greene; Pittonia 5: 261 (1903)
= Eschscholzia australis Greene; Pittonia 5: 249 (1903)
= Eschscholzia benedicta Greene; Pittonia 5: 228 (1903)
= Eschscholzia bernardina Greene; Pittonia 5: 255 (1903)
= Eschscholzia bernardina var. coarctata Fedde; Repert. Spec. Nov. Regni Veg. 3: 183 (1906)
= Eschscholzia bicornuta Greene; Pittonia 5: 249 (1903)
= Eschscholzia biolettii Greene; Pittonia 5: 232 (1903)
= Eschscholzia brandegeei Greene; Pittonia 5: 248 (1905)
= Eschscholzia californica var. ambigua (Greene) Jeps.; Fl. W. Calif. [Jepson] 208 (1901)
= Eschscholzia californica var. compacta (Lindl.) Jeps.; Fl. W. Calif. [Jepson] 208 (1901)
= Eschscholzia californica var. crocea (Benth.) Jeps.; Fl. W. Calif. [Jepson] 207 (1901)
= Eschscholzia californica var. douglasii (Hook. & Arn. ex Torr. & A.Gray) Jeps.; Fl. W. Calif. [Jepson] 208 (1901)
= Eschscholzia californica var. luxurians Fedde; Repert. Spec. Nov. Regni Veg. 3: 27 (1906)
= Eschscholzia californica var. maritima (Greene) Jeps.; Fl. Calif. [Jepson] 1: 570 (1922)
= Eschscholzia californica var. peninsularis (Greene) Munz; Man. S. Calif. Bot. [Munz] 181 (1935)
= Eschscholzia californica var. stricta (Greene) Jeps.; Fl. Calif. [Jepson] 1: 570 (1922)
= Eschscholzia calosperma Greene; Pittonia 5: 246 (1903)
= Eschscholzia chartacea Fedde; Repert. Spec. Nov. Regni Veg. 3: 105 (1906)
= Eschscholzia clevelandi Greene; Pittonia 5: 248 (1903)
= Eschscholzia cognata Greene; Pittonia 5: 252 (1903)
= Eschscholzia columbiana Greene; Pittonia 5: 231 (1903)
= Eschscholzia compacta (Lindl.) Walp.; Repert. Bot. Syst. [Walpers] 1: 116 (1842)
= Eschscholzia confinis Greene; Pittonia 5: 237 (1903)
= Eschscholzia crassula Greene; Pittonia 5: 266 (1903)
= Eschscholzia crocea Benth.; Trans. Hort. Soc. London, Ser. 2, 1: 407 (1834 publ. 1835)
= Eschscholzia crocea var. apiifolia Greene; Pittonia 5: 241 (1905)
= Eschscholzia crocea var. longissima Greene; Pittonia 5: 241 (1905)
= Eschscholzia crocea var. rosea (J.J.Veitch) J.Vick; Vick´s Ill. Cat. Fl. Guide, ed. 8: unnumbered insert. (1869)
= Eschscholzia crocea var. sanctarum (Greene) Fedde; Repert. Spec. Nov. Regni Veg. 2: 147 (1906)
= Eschscholzia cucullata Greene; Erythea 2: 120 (1894)
= Eschscholzia cyathifera Greene; Pittonia 5: 263 (1903)
= Eschscholzia debilis Greene; Pittonia 5: 227 (1903)
= Eschscholzia diversiloba Greene; Pittonia 5: 256 (1903)
= Eschscholzia douglasii Benth.; Pl. Hartw. [Bentham] 296 (1848)
= Eschscholzia eastwoodiae Greene; Pittonia 5: 227 (1903)
= Eschscholzia exilis Greene; Pittonia 5: 265 (1903)
= Eschscholzia floribunda Greene; Pittonia 5: 247 (1903)
= Eschscholzia floribunda var. gorgonica Greene; Pittonia 5: 247 (1905)
= Eschscholzia floribunda var. gracillima Fedde; Repert. Spec. Nov. Regni Veg. 3: 105 (1906)
= Eschscholzia foeniculacea Greene; Pittonia 5: 224 (1905)
= Eschscholzia gigas Fedde; Repert. Spec. Nov. Regni Veg. 3: 28 (1906)
= Eschscholzia glauca Greene; Pittonia 1: 45 (1887)
= Eschscholzia granulata Greene; Pittonia 5: 235 (1903)
= Eschscholzia granulata var. minuscula Fedde; Repert. Spec. Nov. Regni Veg. 2: 147 (1906)
= Eschscholzia helleriana Greene; Pittonia 5: 229 (1903)
= Eschscholzia helleriana var. tilingii Fedde; Repert. Spec. Nov. Regni Veg. 3: 27 (1906)
= Eschscholzia humilis Greene; Pittonia 5: 265 (1905)
= Eschscholzia inflata Greene; Pittonia 5: 264 (1905)
= Eschscholzia isostigma Greene; Pittonia 5: 254 (1905)
= Eschscholzia juncea Greene; Pittonia 5: 228 (1905)
= Eschscholzia lacera Greene; Pittonia 5: 250 (1905)
= Eschscholzia leptandra Greene; Pittonia 1: 170 (1888)
= Eschscholzia leptomitra Greene; Pittonia 5: 265 (1905)
= Eschscholzia leucosticta Greene; Pittonia 5: 229 (1905)
= Eschscholzia ludens Greene; Pittonia 5: 272 (1905)
= Eschscholzia marcida Greene; Pittonia 5: 233 (1903)
= Eschscholzia marcida var. monticola Greene; Pittonia 5: 233 (1905)
= Eschscholzia maritima Greene; Pittonia 1: 60 (1887)
= Eschscholzia menziesiana Greene; Pittonia 5: 223 (1903)
= Eschscholzia menziesiana var. anemophila Greene; Pittonia 5: 223 (1905)
= Eschscholzia menziesiana var. coarctata Fedde; Repert. Spec. Nov. Regni Veg. 2: 148 (1906)
= Eschscholzia menziesiana var. nesiaca Fedde; Repert. Spec. Nov. Regni Veg. 2: 148 (1906)
= Eschscholzia menziesiana var. recedens Greene; Pittonia 5: 223 (1905)
= Eschscholzia microloba Greene; Pittonia 5: 250 (1905)
= Eschscholzia nitrophila Greene; Pittonia 5: 240 (1905)
= Eschscholzia oregana Greene; Pittonia 5: 282 (1903)
= Eschscholzia peninsularis Greene; Bull. Calif. Acad. Sci. 1(3): 68 (1885)
= Eschscholzia physodes Greene; Pittonia 5: 259 (1903)
= Eschscholzia picta Greene; Pittonia 5: 255 (1903)
= Eschscholzia pseudoinflata Fedde; Repert. Spec. Nov. Regni Veg. 3: 75 (1906)
= Eschscholzia pseudopraecox Fedde; Notizbl. Königl. Bot. Gart. Berlin 4: 153 (1905)
= Eschscholzia ptarmicoides Greene; Pittonia 5: 270 (1903)
= Eschscholzia quadrangularis Greene; Pittonia 5: 264 (1905)
= Eschscholzia recta Greene; Pittonia 5: 245 (1905)
= Eschscholzia revoluta Greene; Pittonia 5: 247 (1905)
= Eschscholzia revoluta var. caudatocalyx Fedde; Repert. Spec. Nov. Regni Veg. 3: 105 (1906)
= Eschscholzia rigida Greene; Pittonia 5: 244 (1905)
= Eschscholzia robusta Greene; Pittonia 5: 266 (1905)
= Eschscholzia rosea J.J.Veitch; Gard. Chron. 1868: 1336 (1868)
= Eschscholzia sanctarum Greene; Pittonia 5: 243 (1905)
= Eschscholzia scapifera Fedde; Notizbl. Königl. Bot. Gart. Berlin 4: 153 (1905)
= Eschscholzia scariosa Greene; Pittonia 5: 243 (1905)
= Eschscholzia scariosa var. dichasiophora Fedde; Repert. Spec. Nov. Regni Veg. 3: 75 (1906)
= Eschscholzia setchellii Fedde; Repert. Spec. Nov. Regni Veg. 5: 183 (1906)
= Eschscholzia shastensis Greene; Pittonia 5: 234 (1905)
= Eschscholzia straminea Greene; Pittonia 5: 157 (1905)
= Eschscholzia stricta Greene; Pittonia 5: 236 (1905)
= Eschscholzia tenuisecta Greene; Pittonia 1: 169 (1888)
= Eschscholzia thermophila Greene; Pittonia 5: 256 (1905)
= Eschscholzia tristis Fedde; Pflanzenr. [Engler] IV.104, Heft 40 (Papaver.-Hypec.-Papav.): 170 (1909)
= Eschscholzia vaccarum Greene; Pittonia 5: 282 (1905)
= Eschscholzia vernalis Greene; Pittonia 5: 258 (1905)
= Eschscholzia xylorrhiza Greene; Pittonia 5: 238 (1905)
= Eschscholzia yainacensis Greene; Pittonia 5: 234 (1905)
= Eschscholzia yainacensis var. modocensis Fedde; Repert. Spec. Nov. Regni Veg. 3: 28 (1906)
= Omonoia californica (Cham.) Raf.; Fl. Tellur. 2: 92 (1837)