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FNA | Family List | FNA Vol. 4 | Chenopodiaceae | Atriplex

34. Atriplex coronata S. Watson, Proc. Amer. Acad. Arts. 9: 114. 1874.

Wedgescale, crownscale

Atriplex elegans (Moquin-Tandon) D. Dietrich var. coronata (S. Watson) M. E. Jones; Obione coronata (S. Watson) Ulbrich

Herbs, erect or decumbent, 0.5-6 dm; branches terete, fructiferous almost to base, scurfy when young. Leaves alternate, subsessile or proximal short petiolate; blade ascending, oblong, oblong-ovate, or lanceolate to elliptic, 5-40 × 2-10 mm, thin, base acute to obtuse, margin entire, apex acute to acuminate. Flowers of both sexes in small axillary glomerules, 5-merous. Fruiting bracteoles almost sessile, broadly cuneate, 2-5 × (2-)2.5-5 mm, united to summit, truncate at summit, sides smooth or obscurely tuberculate. Seeds light brown to amber, 1-1.5 mm. 2n = 36.

Varieties 3 (3 in the flora): California.

Although placed within the Atriplex argentea species complex by P. C. Standley (1916), this taxon appears more nearly allied to A. cordulata, differing mainly in leaf shape, round-ovate or deltoid-ovate to elliptic or lanceolate (not ovate to cordate-ovate), and markedly tuberculate faces of the fruiting bracteoles.

1 Stems ± erect; body of fruiting bracteoles ± semicircular in profile, compressed or ± spheric; tubercles dense; marginal teeth ± equal.   34c var. notatior
+ Stems decumbent to ascending; body of fruiting bracteoles approaching circular or flabellate in profile, ± compressed; tubercles usually few; marginal teeth unequal   (2)
2 (1) Fruiting bracteoles 2-4 mm; basal branches and leaves typically opposite.   34b var. vallicola
+ Fruiting bracteoles (2-)4-5 mm; basal branches and leaves typically alternate   34a var. coronata


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