Atriplex argentea var. mohavensis

(M. E. Jones) S. L. Welsh
Common names: Mohave orach
Basionym: Atriplex expansa var. mohavensis M. E. Jones Contr. W. Bot. 11: 20. 1903
Synonyms: Atriplex expansa var. trinervata (Jepson) J. F. Macbride Atriplex sordida Jepson Atriplex trinervata
Treatment appears in FNA Volume 4. Treatment on page 351. Mentioned on page 350.

Stems erect or decumbent, much branched, 3–12(–20) dm, forming clumps 3–10(–30) dm broad; branches obtusely to sharply angled, finely scurfy, white scurfy to glabrate. Leaves: petiole 2–21 mm on proximal leaves, distal ones sessile; blade 3-veined at base, ovate to lance-ovate, or deltoid-ovate, (10–)25–75 mm and often as broad, margin irregularly dentate or entire. Flowers of sexes intermixed in glomerules or staminate ones in distinct glomerules. Staminate flowers 5-merous. Pistillate flowers in axillary fascicles. Fruiting bracteoles sessile to subsessile, orbicular or cuneate-orbicular, mostly 3-veined, (3–)4–7 × 2–4 mm, united to middle, margin sharply dentate, faces with a few irregular, green projections or crests, or unappendaged.

Phenology: Flowering summer–fall.
Habitat: Dry or saline substrates
Elevation: above 1000 m


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Ariz., Calif., N.Mex., Nev., Okla., Tex., Mexico.


Atriplex argentea var. mohavensis is a tall, bushy plant with tumbleweed proportions. Its morphologic differences, slight though they may be, are geographically based.

Selected References


Lower Taxa

Stanley L. Welsh +
(M. E. Jones) S. L. Welsh +
Atriplex expansa var. mohavensis +
Mohave orach +
Ariz. +, Calif. +, N.Mex. +, Nev. +, Okla. +, Tex. +  and Mexico. +
above 1000 m +
Dry or saline substrates +
Flowering summer–fall. +
Gen. N. Amer. Pl. +
Atriplex expansa var. trinervata +, Atriplex sordida +  and Atriplex trinervata +
Atriplex argentea var. mohavensis +
Atriplex argentea +
variety +