This name is a synonym.
* Wellingtonia gigantea Lindl., Gard. Chron. 1852: 823 (1853).
Americus gigantea (Lindl.) Hanford, Great Calif. Tree: 6 (1854).
Sequoia gigantea (Lindl.) Decne., Bull. Soc. Bot. France 1: 70 (1854), nom. illeg.
Taxodium washingtonianum Winslow, Calif. Farmer & J. Useful Sci. 2: 58 (1854), nom. superfl.
Washingtonia californica Winslow, Calif. Farmer & J. Useful Sci. 2: 58 (1854), nom. superfl.
Sequoia wellingtonia Seem., Bonplandia (Hannover) 3: 27 (1855).
Gigantabies wellingtoniana (Seem.) J.Nelson, Pinaceae: 79 (1866), nom. superfl.
Taxodium giganteum (Lindl.) Kellogg & Behr, Proc. Calif. Acad. Sci., ed. 2, 1: 51 (1873).
Sequoia washingtoniana Sudw., Bull. Div. Forest. U.S.D.A. 14: 61 (1897), nom. superfl.
Steinhauera gigantea (Lindl.) Kuntze ex Voss, Mitt. Deutsch. Dendrol. Ges. 16: 90 (1907).
Sequoiadendron giganteum (Lindl.) J.Buchholz, Amer. J. Bot. 26: 536 (1939).
* Basionym/Replaced Synonym