Chenopodium neomexicanum group

Chenopodium arizonicum Standl.

Ill-scented erect annual, 3-6 dm. high, simple at the base, branched above, the branches usually slender, obtusely angled, ascending, sometimes from a spreading base, very sparsely and finely farinose or glabrate, tinged with red, at least below; petioles slender, one half to two thirds as long as the blades; leaf-blades triangular to rhombic-ovate, 0.7-1.6 cm. long, acute or obtuse at the apex, apiculate, broadly cuneate to rounded at the base, thin, green and glabrate on. the upper surface, very finely and usually densely farinose beneath, the upper blades ovate to lanceolate or elliptic, acute or acuminate to a cuspidate tip; flowers in very small glomerules, these in slender, dense or interrupted, paniculate spikes, the branches of the inflorescence usually slender and flexuous, nearly naked; calyx sparsely farinose, deeply cleft, the lobes broadly oblong or ovate, obtusely carinate, incompletely enclosing the fruit; pericarp adherent; seed horizontal, 1 mm. broad, black and shining, puncticulate, the margin obtuse. -Standley

Chenopodium flabellifolium Standl.

Plants very slender, 3 dm. high, much branched from the base, the branches ascending, terete, stramineous, finely and rather sparsely farinose; petioles very slender, equaling or usually longer than the blades, sometimes twice as long; leaf-blades flabelliform to very broadly rhombic, 4-10 mm. long, 4-12 mm. broad, commonly broader than long, broadly cuneate to truncate at the base, broadly rounded at the apex, mucronulate, entire or very obscurely 3- lobed, the lateral lobes entire or with 2 broad obtuse teeth, the terminal lobe entire or rarely obscurely and remotely dentate, densely and finely puberulent on both surfaces when young, becoming glabrate in age, the uppermost blades smaller and narrower, sometimes acute; flowers in very small glomerules, these in slender, interrupted, simple or narrowly paniculate spikes, the inflorescence nearly naked; calyx deeply 5-cleft, loosely farinose, the lobes broad, rounded at the apex, obscurely carinate, enclosing the fruit; pericarp adherent; seed horizontal, 1 mm. broad, black, lustrous, smooth, the margin acutish. -Standley

Chenopodium lenticulare Aellen

Chenopodium neomexicanum Standl.

Ill-scented erect annual, 6-7 dm. high, simple below, sparsely branched above, the branches slender, strongly ascending, sparsely and very finely farinose, nearly terete, often tinged with red; petioles slender, equaling or only half as long as the blades; leaf-blades deltoid to orbicularovate or rhombic-ovate, 1.5-2.8 cm. long, rounded at the apex and scarcely apiculate, truncate or rounded at the base, subhastate, with low, rounded or acutish lobes, very thin, green and glabrate on the upper surface, sparsely and very finely farinose beneath, the upper blades smaller, often ovate to oblong, entire, acute; flowers in rather large glomerules, these in dense, stout, narrowly paniculate spikes, the inflorescence nearly naked; calyx rather sparsely farinose, cleft to the middle or lower, the lobes rounded-obovate, green, slightly carinate, completely enclosing the fruit; pericarp adherent; seed horizontal, 1.3-1.5 mm. broad, nearly black, shining, puncticulate, the margin obtuse. - Standley

Chenopodium palmeri Standl.

Ill-scented erect annual, 6-8 dm. high, much branched above, the branches strongly ascending, slender, obtusely angled, pale-greenish, copiously but very finely farinose; petioles slender, equaling or two thirds as long as the blades; leaf-blades broadly rhombic-ovate, 1.5-2.5 cm. long, rounded or broadly obtuse at the apex, apiculate, rounded or broadly cuneate at the base, entire, or usually with 2 small rounded lobes at the base, very thin, green and glabrate on the upper surface, densely but very finely and closely farinose beneath, the upper blades smaller, entire, obtuse; flowers in small glomerules, these in slender, dense or interrupted, paniculate spikes, the inflorescence ample, open, with slender, nearly naked branches ; calyx densely farinose, deeply cleft, the lobes oval or broadly oblong, incompletely enclosing the fruit; pericarp adherent; seed horizontal, 0.7-0.8 mm. broad, dark reddish-brown, shining, nearly smooth, the margin obtuse. - Standley

Chenopodium parryi Standl.

Ill-scented erect annual, 6-8 dm. high, much branched above, the branches strongly ascending, slender, obtusely angled, pale-greenish, copiously but very finely farinose; petioles slender, equaling or two thirds as long as the blades; leaf-blades broadly rhombic-ovate, 1.5-2.5 cm. long, rounded or broadly obtuse at the apex, apiculate, rounded or broadly cuneate at the base, entire, or usually with 2 small rounded lobes at the base, very thin, green and glabrate on the upper surface, densely but very finely and closely farinose beneath, the upper blades smaller, entire, obtuse; flowers in small glomerules, these in slender, dense or interrupted, paniculate spikes, the inflorescence ample, open, with slender, nearly naked branches; calyx densely farinose, deeply cleft, the lobes oval or broadly oblong, incompletely enclosing the fruit; pericarp adherent; seed horizontal, 0.7-0.8 mm. broad, dark reddish-brown, shining, nearly smooth, the margin obtuse. -Standley

Chenopodium sonorense Benet-Pierce & M.G. Simpson

Plant an erect annual, ~ 3-4 dm high, ill-scented. Stems slender, sparsely branched, branches ascending, weak. Leaves alternate, yellowish-green, farinose; leaf-blades 0.6–1.5 cm long, round-ovate, ovate to lanceolate, elliptic, or triangular, usually with squarish, lateral basal lobes, occasionally sinuate in the often reduced central lobe, apex obtuse or rounded; upper blades smaller, triangular, elliptic, or lanceolate, entire, usually with prominent squarish double basal lobes, these rounded, apex obtuse or acute. Inflorescences in narrow, paniculate spikes. Flowers ~ 1 mm in diameter. Perianth uniseriate; calyx synsepalous, distinct to near base; lobes apically obtuse, farinose abaxially. Stamens five, distinct, whorled, antisepalous, yellowish; filaments terete; anthers laterally dehiscent, dithecal, sub-basifixed. Gynoecium with two stigmas. Fruit, lenticular, ~ 1.1 (1.0–1.2) mm in diameter, seed embryo horizontal, equatorial margin thick in side view; fruit wall adherent, papillate. Papillae large, often not collapsed, radially white or blackish above, occasionally even faintly so and fuzzy dark with minute, elongated papillae usually collapsed, forming alternating brown or whitish lines below. Seed coat black, rugose