= Amsinckia abbreviata Suksd.; Werdenda 1: 56 (1931)
= Amsinckia abramsii Suksd.; Werdenda 1: 72 (1931)
= Amsinckia acuticarpa Suksd.; Werdenda 1: 68 (1931)
= Amsinckia albicarpa Suksd.; Werdenda 1: 90 (1931)
= Amsinckia ammophila Suksd.; Werdenda 1: 92 (1931)
= Amsinckia amplexicaulis Suksd.; Werdenda 1: 83 (1931)
= Amsinckia andersonii Suksd.; Werdenda 1: 62 (1931)
= Amsinckia angulata Suksd.; Werdenda 1: 109 (1931)
= Amsinckia angustata Suksd.; Werdenda 1: 83 (1931)
= Amsinckia angustisepala Suksd.; Werdenda 1: 64 (1931)
= Amsinckia appressa Suksd.; Werdenda 1: 60 (1931)
= Amsinckia arizonica Suksd.; Werdenda 1: 91 (1931)
= Amsinckia arvensis Suksd.; Werdenda 1: 32 (1927)
= Amsinckia attenuata Eastw. ex Suksd.; Werdenda 1: 79 (1931)
= Amsinckia aurea Suksd.; Werdenda 1: 84 (1931)
= Amsinckia bakeri Suksd.; Werdenda 1: 87 (1931)
= Amsinckia borealis Suksd.; Werdenda 1: 71 (1931)
= Amsinckia brachycalyx Suksd.; Werdenda 1: 76 (1931)
= Amsinckia brandegeeae Suksd.; Werdenda 1: 81 (1931)
= Amsinckia brunnescens Suksd.; Werdenda 1: 57 (1931)
= Amsinckia bullata Suksd.; Werdenda 1: 76 (1931)
= Amsinckia caduca Suksd.; Werdenda 1: 79 (1931)
= Amsinckia californica Suksd.; Werdenda 1: 50 (1931)
= Amsinckia cana Suksd.; Werdenda 1: 96 (1931)
= Amsinckia canadensis Suksd.; Werdenda 1: 77 (1931)
= Amsinckia canescens Suksd.; Werdenda 1: 75 (1931)
= Amsinckia catalinensis Suksd.; Werdenda 1: 53 (1931)
= Amsinckia ciliata Suksd.; Werdenda 1: 87 (1931)
= Amsinckia communis Suksd.; Werdenda 1: 65 (1931)
= Amsinckia condensata Suksd.; Werdenda 1: 88 (1931)
= Amsinckia congesta Suksd.; Werdenda 1: 82 (1931)
= Amsinckia congruens Suksd.; Werdenda 1: 67 (1931)
= Amsinckia conspicua Suksd.; Werdenda 1: 73 (1931)
= Amsinckia cristata Eastw. ex Suksd.; Werdenda 1: 58 (1931)
= Amsinckia ctenocarpa Suksd.; Werdenda 1: 66 (1931)
= Amsinckia debilis Brand; Repert. Spec. Nov. Regni Veg. 25: 212 (1928)
= Amsinckia decumbens Suksd.; Werdenda 1: 86 (1931)
= Amsinckia delicata Suksd.; Werdenda 1: 81 (1931)
= Amsinckia demissa Suksd.; Werdenda 1: 88 (1931)
= Amsinckia densiflora Suksd.; Werdenda 1: 74 (1931)
= Amsinckia densifolia Suksd.; Werdenda 1: 80 (1931)
= Amsinckia densirugosa Suksd.; Werdenda 1: 111 (1931)
= Amsinckia dictyota Suksd.; Werdenda 1: 78 (1931)
= Amsinckia divergens Suksd.; Werdenda 1: 70 (1931)
= Amsinckia diversifolia Suksd.; Werdenda 1: 79 (1931)
= Amsinckia echinata A.Gray; Proc. Amer. Acad. Arts 10: 54 (1874)
= Amsinckia elmeri Suksd.; Werdenda 1: 66 (1931)
= Amsinckia elongata Suksd.; Werdenda 1: 61 (1931)
= Amsinckia evermannii Suksd.; Werdenda 1: 78 (1931)
= Amsinckia exserta Eastw. ex Suksd.; Werdenda 1: 85 (1931)
= Amsinckia fluviatilis Suksd.; Werdenda 1: 90 (1931)
= Amsinckia foliosa Suksd.; Werdenda 1: 90 (1931)
= Amsinckia franciscana Suksd.; Werdenda 1: 65 (1931)
= Amsinckia grayi Suksd.; Werdenda 1: 83 (1931)
= Amsinckia hallii Suksd.; Werdenda 1: 73 (1931)
= Amsinckia hansenii Brand; Repert. Spec. Nov. Regni Veg. 25: 213 (1928)
= Amsinckia helleri Suksd.; Werdenda 1: 72 (1931)
= Amsinckia hendersonii Suksd.; Werdenda 1: 107 (1931)
= Amsinckia hirsuta Suksd.; Werdenda 1: 74 (1931)
= Amsinckia hispidula Suksd.; Werdenda 1: 57 (1931)
= Amsinckia howellii Brand; Repert. Spec. Nov. Regni Veg. 25: 213 (1928)
= Amsinckia humilis Suksd.; Werdenda 1: 81 (1931)
= Amsinckia hyperborea Suksd.; Werdenda 1: 89 (1931)
= Amsinckia incongruens Suksd.; Werdenda 1: 71 (1931)
= Amsinckia incurva Suksd.; Werdenda 1: 57 (1931)
= Amsinckia insularis Suksd.; Werdenda 1: 75 (1931)
= Amsinckia intermedia Fisch. & C.A.Mey.; Ind. Sem. Hort. Petrop. 2: 26 (1836)
= Amsinckia intermedia var. attenuata (Eastw. ex Suksd.) Hoover; Jeps., Fl. Calif. 3: 325 (1939)
= Amsinckia intermedia var. californica (Suksd.) Hoover; Jeps., Fl. Calif. 3: 323 (1939)
= Amsinckia intermedia var. echinata (A.Gray) Wiggins; Contr. Dudley Herb. 4: 22 (1950)
= Amsinckia irritans Brand; Repert. Spec. Nov. Regni Veg. 25: 213 (1928)
= Amsinckia keckii Suksd.; Werdenda 1: 82 (1931)
= Amsinckia kennedyi Suksd.; Werdenda 1: 64 (1931)
= Amsinckia lacunosa Suksd.; Werdenda 1: 66 (1931)
= Amsinckia lanceolata Suksd.; Werdenda 1: 82 (1931)
= Amsinckia lancifolia Suksd.; Werdenda 1: 80 (1931)
= Amsinckia latiflora Suksd.; Werdenda 1: 86 (1931)
= Amsinckia laxa Suksd.; Werdenda 1: 87 (1931)
= Amsinckia leibergii Brand; Repert. Spec. Nov. Regni Veg. 25: 214 (1928)
= Amsinckia leptoclada Suksd.; Werdenda 1: 50 (1931)
= Amsinckia leptostachya Suksd.; Werdenda 1: 92 (1931)
= Amsinckia leucosperma Suksd.; Werdenda 1: 85 (1931)
= Amsinckia linearifolia Suksd.; Werdenda 1: 79 (1931)
= Amsinckia longifolia Brand; Repert. Spec. Nov. Regni Veg. 26: 168 (1929)
= Amsinckia longistylus Suksd.; Werdenda 1: 50 (1931)
= Amsinckia longituba Brand; Repert. Spec. Nov. Regni Veg. 25: 212 (1928)
= Amsinckia macounii Brand; Repert. Spec. Nov. Regni Veg. 25: 211 (1928)
= Amsinckia macra Suksd.; Werdenda 1: 108 (1931)
= Amsinckia manningiae Suksd.; Werdenda 1: 64 (1931)
= Amsinckia media E.H.L.Krause; Sturm, Deutschl. Fl. Abbild., ed. 2, 11: 42 (1903)
= Amsinckia melanocarpa Suksd.; Werdenda 1: 89 (1931)
= Amsinckia menziesii var. echinata (A.Gray) Brand; Engl., Pflanzenr., IV, 252(97): 211 (1931)
= Amsinckia microcalyx Brand; Repert. Spec. Nov. Regni Veg. 25: 211 (1928)
= Amsinckia microphylla Suksd.; Werdenda 1: 91 (1931)
= Amsinckia modesta Suksd.; Werdenda 1: 93 (1931)
= Amsinckia mollis Suksd.; Werdenda 1: 54 (1931)
= Amsinckia multiflora Suksd.; Werdenda 1: 76 (1931)
= Amsinckia multispicata Suksd.; Werdenda 1: 54 (1931)
= Amsinckia nana Suksd.; Werdenda 1: 84 (1931)
= Amsinckia neomexicana Suksd.; Werdenda 1: 71 (1931)
= Amsinckia nephrocarpa Suksd.; Werdenda 1: 91 (1931)
= Amsinckia nesophila Suksd.; Werdenda 1: 93 (1931)
= Amsinckia nitidicaulis Suksd.; Werdenda 1: 93 (1931)
= Amsinckia obtusifolia Suksd.; Werdenda 1: 91 (1931)
= Amsinckia orcuttii Suksd.; Werdenda 1: 109 (1931)
= Amsinckia oregonensis Suksd.; Werdenda 1: 85 (1931)
= Amsinckia orthocarpa Suksd.; Werdenda 1: 76 (1931)
= Amsinckia oxycarpa Suksd.; Werdenda 1: 52 (1931)
= Amsinckia palmeri Suksd.; Werdenda 1: 65 (1931)
= Amsinckia paludosa Suksd.; Werdenda 1: 74 (1931)
= Amsinckia palustris Suksd.; Werdenda 1: 86 (1931)
= Amsinckia parishii Brand; Repert. Spec. Nov. Regni Veg. 20: 320 (1924)
= Amsinckia parshii Suksd.; Werdenda 1: 70 (1931), nom. illeg.
= Amsinckia peltata Suksd.; Werdenda 1: 66 (1931)
= Amsinckia peltigera Suksd.; Werdenda 1: 53 (1931)
= Amsinckia perrugosa Suksd.; Werdenda 1: 57 (1931)
= Amsinckia philippii Suksd.; Werdenda 1: 105 (1931)
= Amsinckia pleurocarpa Suksd.; Werdenda 1: 73 (1931)
= Amsinckia praecox Suksd.; Werdenda 1: 55 (1931)
= Amsinckia pratensis Suksd.; Werdenda 1: 67 (1931)
= Amsinckia propinqua Suksd.; Werdenda 1: 55 (1931)
= Amsinckia pullata Suksd.; Werdenda 1: 67 (1931)
= Amsinckia punctata Suksd.; Werdenda 1: 89 (1931)
= Amsinckia purpusii Suksd.; Werdenda 1: 92 (1931)
= Amsinckia pusilla Suksd.; Werdenda 1: 85 (1931)
= Amsinckia quercetorum Suksd.; Werdenda 1: 61 (1931)
= Amsinckia ramosissima Suksd.; Werdenda 1: 72 (1931)
= Amsinckia rigida Suksd.; Werdenda 1: 91 (1931)
= Amsinckia rivularis Suksd.; Werdenda 1: 92 (1931)
= Amsinckia robusta Suksd.; Werdenda 1: 61 (1931)
= Amsinckia rostrata Suksd.; Werdenda 1: 106 (1931)
= Amsinckia rugosa Rydb.; Fl. Rocky Mts. 729 (1917)
= Amsinckia rugosa Suksd.; Werdenda 1: 57 (1931), nom. illeg.
= Amsinckia rugosissima Suksd.; Werdenda 1: 77 (1931)
= Amsinckia rupestris Suksd.; Werdenda 1: 77 (1931)
= Amsinckia santae-barbarae Brand; Repert. Spec. Nov. Regni Veg. 26: 168 (1929)
= Amsinckia scabra Suksd.; Werdenda 1: 65 (1931)
= Amsinckia scabricarpa Suksd.; Werdenda 1: 93 (1931)
= Amsinckia simplex Suksd.; Werdenda 1: 33 (1927)
= Amsinckia solida Suksd.; Werdenda 1: 84 (1931)
= Amsinckia sparsifolia Suksd.; Werdenda 1: 84 (1931)
= Amsinckia sparsiseta Suksd.; Werdenda 1: 80 (1931)
= Amsinckia speciosa Suksd.; Werdenda 1: 50 (1931)
= Amsinckia spencerae Suksd.; Werdenda 1: 86 (1931)
= Amsinckia strigosa Suksd.; Werdenda 1: 70 (1931)
= Amsinckia subglabricaulis Suksd.; Werdenda 1: 58 (1931)
= Amsinckia swainiae Suksd.; Werdenda 1: 72 (1931)
= Amsinckia toussaintii Brand; Repert. Spec. Nov. Regni Veg. 26: 168 (1929)
= Amsinckia utahensis Suksd.; Werdenda 1: 106 (1931)
= Amsinckia verrucosa Suksd.; Werdenda 1: 54 (1931)
= Amsinckia verrucosissima Suksd.; Werdenda 1: 105 (1931)
= Amsinckia vestita Suksd.; Werdenda 1: 81 (1931)
= Amsinckia viridifolia Suksd.; Werdenda 1: 75 (1931)
= Amsinckia vulgaris Suksd.; Werdenda 1: 60 (1931)
= Amsinckia washingtonensis Suksd.; Werdenda 1: 110 (1931)
= Benthamia intermedia (Fisch. & C.A.Mey.) Druce; Rep. Bot. Exch. Club Soc. Brit. Isles 3: 25 (1911 publ. 1912)