Axyris

Linnaeus

Sp. Pl. 2: 979. 1753.

,

Gen. Pl. ed. 5, 420. 1754.

Common names: Russian pigweed
Etymology: Greek axyros (a, not, and xyrios, razor), blunt, not cutting, in reference to the mild taste
Treatment appears in FNA Volume 4. Treatment on page 308. Mentioned on page 260.

Herbs, annual, monoecious, covered with rusty-colored, stellate, and whitish simple trichomes. Stems ascending, not jointed or armed, slender. Leaves alternate, petiolate; blade ovatelanceolate to narrowly lanceolate, base tapered, margins entire, plane or revolute, apex acute to acuminate. Inflorescences glomerules, cymes, or flowers solitary. 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. Flowers unisexual; staminate with perianth segments 3–5, stamens 2–5; pistillate with bracteoles 2, perianth segments 3–4, stigmas 2, filiform. Fruiting structures persistent, accrescent perianth surrounding utricle; utricles winged, obovate to cuneate, laterally compressed; pericarp adherent. Seeds vertical, ovoid; seed-coat grayish, granular; embryo horseshoe-shaped; perisperm copious. x = 9.

Distribution

Introduced; Eurasia

Discussion

Species ca. 5 (1 in the flora).

Selected References

None.

... more about "Axyris"
Acute (?) +  and Acuminate (?) +
Leila M. Shultz +
Linnaeus +
slippery +
aromatic +
tapered +
ovatelanceolate +  and narrowly lanceolate +
persistent +  and deciduous +
reddish-brown +, black +, brown +  and green +
Russian pigweed +
horseshoe--shaped +
Greek axyros (a, not, and xyrios, razor), blunt, not cutting, in reference to the mild taste +
staminate +  and pistillate +
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 +
accrescent +
papery +  and chartaceous +
Sp. Pl. +  and Gen. Pl. ed. +
1753 +  and 1754 +
pointing +  and ascending +
basal +, median +  and position +
bulbous +  and taprooted +
fusiform +
fleshy +  and fibrous +
verrucate +  and striate +
cylindric +
2 (?) +  and 5 (?) +
armed +  and not jointed +
opposite +  and alternate +
slender +
succulent +
filiform +
sessile +  and petiolate +
reduced;small +
horizontal +  and vertical +
verrucate +
Chenopodiaceae +
compressed +, obovate +  and cuneate +