Flora of North America species comparison

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Atriplex coronata

Atriplex pleiantha

crownscale, wedgescale

four-corners orach
Habit Herbs, erect or decumbent, 0.5–6 dm; branches terete, fructiferous almost to base, scurfy when young. Herbs, branching from base, mainly 0.5–1.5 dm, glabrous or sparingly scurfy.
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.

alternate to subopposite, petiolate;

blade ovate to suborbiculate, 5–18(–20) mm, about as wide, margin entire, apex obtuse to acute.
Flowers

of both sexes in small axillary glomerules, 5-merous.

Staminate flowers

in short terminal spikes.
Seeds

light brown to amber, 1–1.5 mm.

falling at maturity, black, 1.5 mm, shining, smooth.
Fruiting

bracteoles almost sessile, broadly cuneate, 2–5 × (2–)2.5–5 mm, united to summit, truncate at summit, sides smooth or obscurely tuberculate.

bracteoles short stipitate, compressed, 3–7 mm wide and about as long, entire;

perianth consisting of 5 hyaline, sparsely ciliate scales 1–1.2 mm.
2n

= 36.

Atriplex coronata

Atriplex pleiantha
Phenology Flowering late summer–fall.
Habitat Salt-desert shrub community
Elevation 1400-1500 m (4600-4900 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; NM; UT
Discussion

Varieties 3 (3 in the flora).

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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Stems ± erect; body of fruiting bracteoles ± semicircular in profile, compressed or ± spheric; tubercles dense; marginal teeth ± equal.
var. notatior
1. Stems decumbent to ascending; body of fruiting bracteoles approaching circular or flabellate in profile, ± compressed; tubercles usually few; marginal teeth unequal
→ 2
2. Fruiting bracteoles 2-4 mm; basal branches and leaves typically opposite.
var. vallicola
2. Fruiting bracteoles (2-)4-5 mm; basal branches and leaves typically alternate
var. coronata
Source FNA vol. 4. FNA vol. 4, p. 345.
Parent taxa Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Pusillae Chenopodiaceae > Atriplex > subg. Obione > sect. Pleianthae
Sibling taxa
A. acanthocarpa, A. amnicola, A. argentea, A. californica, A. canescens, A. confertifolia, A. cordulata, A. corrugata, A. coulteri, A. covillei, A. dioica, A. elegans, A. fruticulosa, A. gardneri, A. garrettii, A. glabriuscula, A. gmelinii, A. graciliflora, A. heterosperma, A. holocarpa, A. hortensis, A. hymenelytra, A. joaquiniana, A. klebergorum, A. laciniata, A. lentiformis, A. leucophylla, A. lindleyi, A. linearis, A. littoralis, A. matamorensis, A. mucronata, A. nudicaulis, A. nummularia, A. oblongifolia, A. obovata, A. pacifica, A. parishii, A. parryi, A. patula, A. pentandra, A. phyllostegia, A. pleiantha, A. polycarpa, A. powellii, A. prostrata, A. pusilla, A. rosea, A. saccaria, A. semibaccata, A. serenana, A. spinifera, A. suberecta, A. suckleyi, A. tatarica, A. torreyi, A. truncata, A. tularensis, A. watsonii, A. wolfii, A. wrightii
A. acanthocarpa, A. amnicola, A. argentea, A. californica, A. canescens, A. confertifolia, A. cordulata, A. coronata, A. corrugata, A. coulteri, A. covillei, A. dioica, A. elegans, A. fruticulosa, A. gardneri, A. garrettii, A. glabriuscula, A. gmelinii, A. graciliflora, A. heterosperma, A. holocarpa, A. hortensis, A. hymenelytra, A. joaquiniana, A. klebergorum, A. laciniata, A. lentiformis, A. leucophylla, A. lindleyi, A. linearis, A. littoralis, A. matamorensis, A. mucronata, A. nudicaulis, A. nummularia, A. oblongifolia, A. obovata, A. pacifica, A. parishii, A. parryi, A. patula, A. pentandra, A. phyllostegia, A. polycarpa, A. powellii, A. prostrata, A. pusilla, A. rosea, A. saccaria, A. semibaccata, A. serenana, A. spinifera, A. suberecta, A. suckleyi, A. tatarica, A. torreyi, A. truncata, A. tularensis, A. watsonii, A. wolfii, A. wrightii
Subordinate taxa
A. coronata var. coronata, A. coronata var. notatior, A. coronata var. vallicola
Synonyms A. elegans var. coronata, Obione coronata Proatriplex pleiantha
Name authority S. Watson: Proc. Amer. Acad. Arts 9: 114. (1874) W. A. Weber: Madroño 10: 189, figs. 1, 2. (1950)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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