Axyris amaranthoides
Sp. Pl. 2: 979. 1753.
Common names: Upright axyris
WeedyIntroducedIllustrated
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.
... more about "Axyris amaranthoides"
whitish-pubescent +
obtuse +
slippery +
tapered +
absent +
1;5 +
monomorphic +
connate +
dimorphic +
absent +
Upright axyris +
pistillate +
2-lobed +
coiled +
curved +
developing +
horseshoe--shaped +
large +
storage +
common +
white +
clustered +
unisexual +
mature +
Present +
true +
pale green +
petiolate +
alternate +
connate +
attached +
campylotropous +
persistent +
imbricate +
absent +
inconspicuous +
accrescent +
fleshy +
accrescent +
mottled +
adherent +
copious +
absent +
absent +
Sp. Pl. +
1753 +
fusiform +
thickened +
scurfy +
inflated +
grayish +
vertical +
ovoid +
cylindric +
pistillate +
absent +
stellate +
ascending +
silvery +
succulent +
filiform +
lacking +
reduced;small +
fleshy +
1;3 +
prickly +
variable +
indistinct +
shiny +
verrucate +
Axyris amaranthoides +
Axyris +
species +
simple +
stellate +
heteromorphic +
surrounding +
annual +
monoecious +