Flora of North America species comparison

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Axyris

Russian pigweed
Habit Herbs, annual, monoecious, covered with rusty-colored, stellate, and whitish simple trichomes.
Stems

ascending, not jointed or armed, slender.
Leaves

alternate, petiolate;

blade ovate-lanceolate to narrowly lanceolate, base tapered, margins entire, plane or revolute, apex acute to acuminate.
Inflorescences

glomerules, cymes, or flowers solitary.
Flowers

unisexual;

staminate with perianth segments 3–5, stamens 2–5;

pistillate with bracteoles 2, perianth segments 3–4, stigmas 2, filiform.
Staminate flowers

in terminal glomerules or at end of pistillate cymes.
Pistillate flowers

solitary in upper leaf axils or forming cymes commingled with staminate flowers.
Seeds

vertical, ovoid;

seed coat grayish, granular;

embryo horseshoe-shaped;

perisperm copious.
Fruiting

structures persistent, accrescent perianth surrounding utricle;

utricles winged, obovate to cuneate, laterally compressed;

pericarp adherent.
x

= 9.

Axyris
Distribution
from USDA
Eurasia [Introduced in North America]
[BONAP county map]
Discussion

Species ca. 5 (1 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 308. Author: Leila M. Shultz.
Parent taxa Chenopodiaceae
Subordinate taxa
A. amaranthoides
Name authority Linnaeus: Sp. Pl. 2: 979. (1753): Gen. Pl. ed. 5, 420. (1754)
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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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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