Atriplex argentea var. expansa

Taxonavigation

Taxonavigation: Caryophyllales
Classification System: APG IV Superregnum: Eukaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Cladus: Angiosperms Cladus: Eudicots Cladus: Core eudicots Ordo: Caryophyllales

Familia: Amaranthaceae s.l.
Cladus: Chenopodiaceae s.str.
Subfamilia: Chenopodioideae
Tribus: Chenopodieae (incl. Atripliceae)
Genus: Atriplex
Species: Atriplex argentea
Varietas: Atriplex argentea var. expansa

Name

Atriplex argentea var. expansa (S.Watson) S.L.Welsh & Reveal, Novon 14(4): 509 (2004).

Synonyms

• Basionym
  • Atriplex expansa S.Watson, Proc. Amer. Acad. Arts 9: 116 (1874).
    • Typus: USA, New Mexico: "39.Chenop. sand bars in Rio Grande below Dona Ana". 1851-7-28, C. Wright 574. Lectotype, designated by S.L.Welsh, N. Amer. Sp. Atriplex: 26 (2003): GH.
• Homotypic
  • Atriplex argentea subsp. expansa (S.Watson) H.M.Hall & Clem., Phylogenet. Meth. 284, pl. 44 (1923).
  • Obione expansa (S.Watson) S.C.Sand. & G.L.Chu, Gen. New Evol. System World Chenopod. 156 (2017).
• Heterotypic
  • Atriplex trinervata Jeps., Pittonia 2(12): 305 (1892).
    • Typus: U.S.A. (California), Solano Co., near the Araquipa Hills, Jepson s.n. [22 Sep 1891]. Holotype (single specimen on 3 sheets): JEPS 2770–2772; Isotype: RSA.
    • Atriplex expansa var. trinervata (Jeps.) J.F.Macbr., Contr. Gray Herb. 53: 9 (1918).
    • Obione trinervata (Jepson) S.C.Sand. & G.L.Chu, Gen. New Evol. System World Chenopod. 168 (2017).
  • Atriplex expansa var. mohavensis M.E.Jones, Contr. W. Bot. 11: 20 (1903).
    • Typus: U.S.A., California: Kern Co., Mojave, 26 Aug 1894, M.E.Jones s.n. Lectotype (designated by Welsh 2003: 26): POM.
    • Atriplex mohavensis (M.E.Jones) Standl., N. Amer. Fl. 21(1): 47 (1916).
    • Atriplex argentea var. mohavensis (M.E.Jones) S.L.Welsh, N. Amer. Sp. Atriplex: [Addendum]: 159 (2003). (Name not correct, when A. expansa is treated as synonym).
  • Atriplex sordida Standl., N. Amer. Fl. 21(1): 47 (1916).
    • Typus: U.S.A., California: Riverside Co. San Jacinto Valley, 1880, G.R. Vasey 549. Holotype: US-48312.

Distribution

Native distribution areas:
Northern America North-Central U.S.A. Oklahoma. South-Central U.S.A. New Mexico, Texas. Southwestern U.S.A. Arizona, California, Nevada. Mexico Mexico Northeast (Chihuahua). References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

References

Primary references

• Hall, H.M. & Clements, F.E. 1923. The phylogenetic method in taxonomy; the North American species of Artemisia, Chrysothamnus, and Atriplex. Washington,The Carnegie institution of Washington. BHL Reference page. : 284
• Jones, M.E. 1903. Contributions to Western Botany, No. 11. Mammoth Record, Robinson, Utah. BHL Reference page. : 20–21
• Jepson, W.L. 1892. New Californian Atriplices. Pittonia 2(12): 303–306. BHL Reference page. : 305
• Macbride, J.F. 1918. New or otherwise interesting plants, mostly North American Liliaceae and Chenopodiaceae. Contributions from the Gray Herbarium of Harvard University 53: 1–22. BHL Reference page. : 9
• Standley, P.C. 1916. Chenopodiaceae. pp. 1–93. In: North American Flora. Vol. 21, Part 1. The New York Botanical Garden. BHLReference page. : 47
• Watson, S. 1874. A revision of the North American Chenopodiaceae. Proceedings of the American Academy of Arts and Sciences 9: 82–126. BHL Reference page. : 116
• Welsh, S.L. 2003. North American Species of Atriplex Linnaeus (Chenopodiaceae): A Taxonomic Revision. Provo, Utah.[privately published]. ISBN 0-8425-2562-9 Reference page. : 159
• Welsh, S.L. & Reveal, J.L. 2004. Atriplex argentea var. expansa (Chenopodiaceae), a new combination for the Flora of North America. Novon 14(4): 509. BHL Reference page. : 509
• Zhu, G.L. & Sanderson, S.C. 2017. Genera and a New Evolutionary System of World Chenopodiaceae. 361 pp. Beijing: Science Press. Reference page. : 156, 168

Additional references

• Welsh, S.L. 2004 "2003". Atriplex. In: Flora of North America North of Mexico 4, Magnoliophyta: Caryophyllidae, Part 1: 322–381. online Reference page. : 351, Atriplex argentea var. mohavensis, isonym
• Welsh, S.L. 2004 ["2003"]. A new combination in Atriplex argentea (Chenopodiaceae), Madroño 50(4): 310. BHL Reference page. , Atriplex argentea var. mohavensis, isonym

Links

• Govaerts, R. et al. 2025. Atriplex argentea var. expansa in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2025 Oct 28. Reference page. 
• International Plant Names Index. 2025. Atriplex argentea var. expansa. Published online. Accessed: 28 Oct 2025. Reference page.
• Hassler, M. 2025. World Plants. Synonymic Checklist and Distribution of the World Flora. . Atriplex argentea var. expansa. Accessed: 28 Oct 2025.Reference page. 
• WFO Plant List 2025. Atriplex argentea var. expansa. Published online. Accessed: 28 October 2025.

• Tropicos.org 2018. Atriplex argentea var. expansa. Missouri Botanical Garden. Published online. Accessed: 26 July 2018. Reference page.

Vernacular names

• English: Mohave orach