Axyris amaranthoides

Linnaeus

Sp. Pl. 2: 979. 1753.

Common names: Upright axyris
WeedyIntroducedIllustrated
Treatment appears in FNA Volume 4. Treatment on page 308. Mentioned on page 309.

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

V4 593-distribution-map.gif

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.
... more about "Axyris amaranthoides"
whitish-pubescent +
Leila M. Shultz +
Linnaeus +
slippery +
aromatic +
tapered +
ovatelanceolate +  and narrowly lanceolate +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
Upright axyris +
Alta. +, B.C. +, Man. +, N.B. +, N.S. +, Ont. +, Que. +, Sask. +, Maine +, Mass. +, Minn. +, Mo. +, Mont. +, N.H. +, N.Y. +, N.Dak. +  and Eurasia +
0-300 m +
horseshoe--shaped +
pistillate +  and staminate +
green +  and whitish +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Waste places +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
9 cm90 mm <br />0.09 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
5 cm50 mm <br />0.05 m <br /> (?) +  and 9 cm90 mm <br />0.09 m <br /> (?) +
not winged +  and winged +
entire +  and serrate +
revolute +, plane +  and entire +
inferior +, half-inferior +  and superior +
crassinucellate +  and bitegmic +
campylotropous +
1 +  and single +
persistent +  and deciduous +
oblong +  and oval +
accrescent +
papery +  and chartaceous +
Flowering summer–fall. +
pointing +  and ascending +
basal +, median +  and position +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
Weedy +, Introduced +  and Illustrated +
cylindric +
armed +  and not jointed +
opposite +  and alternate +
slender +
30 cm300 mm <br />0.3 m <br /> (90 cm900 mm <br />0.9 m <br />) +
succulent +
filiform +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Axyris amaranthoides +
species +
heteromorphic +
dark-brown +  and red +
oval +  and obovate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +