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.
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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

Distribution

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

Discussion

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

None.

Lower Taxa

None.
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 +