Cycloloma atriplicifolium (Spreng.) J.M. Coult. - Winged Pigweed


 

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Cycloloma atriplicifolium - (image 1 of 4)

 

Taxonomy

Family: Chenopodiaceae

 

Monospecific genus

Habitat

Sandy, disturbed soil.

Associates

 

Distribution

Manitoba to IN, AR, and TX, west to UT and NM.

Morphology

Densely branched, annual tumbleweed. Leaves hairy, soon deciduous, lanceolate, coarsely and irregularly toothed, up to 8 cm near the base, progressively reduced upward. Flowers minute, green, perfect or merely pistillate, in spikes 2-6 cm, sessile; sepals 5, calyx 3-4 cm wide, eventually forming a membranous wing below the lobes; ovary flattened, globose; styles filiform. Fruit plano-convex, horizontal, purple or black with a free pericarp.

Notes

Flowers June to October

Wetland Indicator: Facultative Upland

Forms red tumbleweeds in the autumn.

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

 


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 Michael Hough 2010