Flora of North America species comparison

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Atriplex patula

Atriplex leucophylla

common orache, halberd-leaf orache, spear orach, spear orache, spear oracle, spear saltbush, spear saltweed, spearscal e, spearscale orache

beach saltbush, sea scale, whiteleaf orach
Habit Herbs, monoecious or subdioecious, (1.5–)3–9(–15) dm. Herbs, prostrate (decumbent or procumbent), many branched, 1.5–6 dm, somewhat woody below, coarse, white scurfy.
Stems

mostly erect and branched, branches green, obtusely angled or striate, glabrate.

Leaves

alternate except the proximalmost, petiolate;

blade green on both sides, rhombic-lanceolate to lanceolate, oblong, or narrowly lance-oblong or hastate-ovate, 25–120 × 3–40(–75) mm, entire or toothed, proximal ones broadly cuneate or sometimes hastate subbasally with obliquely antrorse basal lobes, distal cauline leaves lanceolate and entire.

many, sometimes crowded;

blade orbiculate to ovate or ovate-lanceolate to elliptic or oblong, 8–40 × 4–18 mm, base obtuse or rounded, white scurfy.
Flowers

compact or interrupted spiciform or paniculiform clusters.

Staminate flowers

mostly 5-merous.

in dense terminal spikes.
Pistillate flowers

in few-flowered, axillary clusters.
Seeds

dimorphic: brown, 2.5–3(–3.5) mm wide, or black, 1–2 mm wide;

radicle of brown seeds subbasal to median, antrorse.

dark red-brown, 2.5–3 mm.
Fruiting

bracteoles green becoming black, rhombic to rhombic-triangular, or ovate-rhombic, compressed, ± uniformly sized, 2–7(–20) mm, base mostly hastate, acute, margin united almost to middle, entire or sparingly toothed, surfaces tuberculate.

bracteoles not compressed, 5–7 mm, faces usually with wartlike projections, scurfy.
2n

= 36.

Atriplex patula

Atriplex leucophylla
Phenology Flowering summer–fall. Flowering spring–fall.
Habitat Widespread ruderal weed of nonsaline substrates such as fields, gardens, and roadsides Sea beaches, along coasts, at higher elevation inland
Elevation 0-2100 m (0-6900 ft) 0-30 m (0-100 ft)
Distribution
from FNA
AK; AL; CA; CO; DC; DE; IA; ID; IL; IN; MA; MD; ME; MI; MO; MT; NC; ND; NH; NV; NY; OH; PA; RI; SD; UT; VA; VT; WI; WY; AB; BC; MB; NB; NF; NS; ON; QC; SK; YT; Europe; Asia; n Africa
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[BONAP county map]
from FNA
CA; Mexico (Baja California)
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[BONAP county map]
Discussion

Atriplex patula appears to have been a rather recent introduction in North America from Eurasia, not arriving perhaps until sometime in the early to mid-eighteenth century. It simulates depauperate specimens of A. dioica, A. glabriuscula, and other similar species when leaves are reduced to a near-linear profile. Such specimens are difficult if not impossible to assign to any of the species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Atriplex leucophylla occurs with Potentilla, Camissonia, Ambrosia, Cakile, and Calystegia.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 333. FNA vol. 4, p. 366.
Parent taxa Chenopodiaceae > Atriplex > subg. Atriplex > sect. Teutliopsis Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Leucophyllae
Sibling taxa
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. 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. 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
Synonyms A. hastata subsp. patula, A. hastata var. patula, Teutiopsis patula Obione leucophylla
Name authority Linnaeus: Sp. Pl. 2: 1053. (1753) (Moquin-Tandon) D. Dietrich: Syn. Pl. 5: 536. (1852)
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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