Axyris amaranthoides
Sp. Pl. 2: 979. 1753.
Common names: Upright axyris
WeedyIntroducedIllustrated
Revision as of 23:17, 27 May 2020 by imported>Volume Importer
Stems (5–)30–90 cm. Leaf blades pale green, (1–)1.5–3 × 5–9(–10) cm. Flowers: perianth segments 3-parted, oblong to oval, apex obtuse, whitish pubescent, with both stellate and simple trichomes adaxially; staminate whitish, less than 2 mm, stamens 3; pistillate green. Utricles red or dark brown, heteromorphic, obovate or oval, 2.5–3 mm, with distal 2-lobed appendage. 2n = 18.
Phenology: Flowering summer–fall.
Habitat: Waste places
Elevation: 0-300 m
Distribution
Introduced; Alta., B.C., Man., N.B., N.S., Ont., Que., Sask., Maine, Mass., Minn., Mo., Mont., N.H., N.Y., N.Dak., Eurasia.
Discussion
Axyris amaranthoides is an invasive and problematic weed, especially in crops of cereal grains. It also has been reported from Colorado and Iowa and is to be expected elsewhere.
Selected References
None.
Lower Taxa
None.