Flora of North America species comparison

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Atriplex oblongifolia

oblong-leaf orach, oblong-leaf orache
Habit Herbs, erect, branching from base, mostly 6–12 dm.
Leaves

alternate above;

petiole 0.5–3 cm;

blade green on both sides or distal leaves whitish abaxially, triangular to lance-triangular, (20–)30–85 × 6–90 mm, base hastate or sub-cuneate, margin subentire, entire, or irregularly dentate, farinaceous at first, later glabrous.
Flowers

in terminal or axillary ± paniculate inflorescences 6–25+ cm.
Staminate flowers

with 5 sepals.
Pistillate flowers

dimorphic, all bracteolate and lacking sepals.
Seeds

vertical; of large bracteoles yellowish brown, 2–3 mm wide, flat, dull; of small bracteoles black, 1.5 mm wide or less, shiny;

radicle of brown seeds subbasal to median and antrorse.
Bracteoles

loosely spaced, of 2 sizes; large fruiting bracteoles oval to ovate, 5–6 × 5 mm, with faces lacking appendages, small ones similar in shape, 2 mm and wide.
2n

= 36.

Atriplex oblongifolia
Phenology Flowering summer.
Habitat Ruderal
Elevation 400-1000 m (1300-3300 ft)
Distribution
from FNA
SD; AB; BC; ON; Europe [Introduced in North America]
[BONAP county map]
Discussion

I. J. Bassett et al. (1983) indicated that Atriplex oblongifolia formed abundant, very fertile hybrids with A. patula in the Botanic Garden at Manchester University. This is a weedy species with facies similar to both A. dioica and A. glabriuscula var. acadiensis. The proximal branches at least are opposite, similar to phases of the nearly allied A. patula, however. It is likewise an introduced ruderal weed of roadsides and other waste places. Its spread in North America awaits documentation. The thin, entire fruiting bracts without appendages are pointed to as diagnostic of this entity from other similar species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 333.
Parent taxa Chenopodiaceae > Atriplex > subg. Atriplex > sect. Teutliopsis
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. 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
Name authority Waldstein & Kitaibel: Descr. Icon. Pl. Hung. 3: 278, plate 211. (1812)
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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