Cycloloma atriplicifolium (Winged Pigweed)

Plant Info
Also known as:
Genus:Cycloloma
Family:Amaranthaceae (Amaranth)
Life cycle:annual
Origin:native
Habitat:sun; dry sandy soil; disturbed or waste places, roadsides, fields
Bloom season:July - August
Plant height:6 to 20 inches
Wetland Indicator Status:GP: FACU MW: FACU NCNE: FACU
MN county distribution (click map to enlarge):Minnesota county distribution map
National distribution (click map to enlarge):National distribution map

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Detailed Information

Flower: Flower shape: 5-petals Flower shape: indistinct Cluster type: panicle Cluster type: spike

[photo of flower] Flowers are very small, green and indistinct, 1/10 inch across, widely spaced in open, diffusely branched spikes. Flowers are either perfect (both ♂ & ♀ parts present) or pistillate (just ♀). In perfect flowers, the 5 yellow-tipped stamens are the most visual component, the 5-parted calyx curving in over the flattened ovary in the center.

Leaves and stems: Leaf attachment: alternate Leaf type: lobed Leaf type: simple

[photo of leaves] Leaves are alternate, pale green, purpling with age, up to 3 inches long and to ¾ inch wide, withering away with maturity (deciduous). Leaves are generally lance shaped, with irregular, sharply pointed lobed-like teeth and narrowing at the base to a short stalk and becoming smaller as they ascend the stem. The shape is reminiscent of Christmas holly. The entire plant is covered in fine cobwebby hairs when young, becoming smooth with age. Stems have parallel lines, are somewhat angled, and are copiously branched.

Fruit: Fruit type: seed without plume

[photo of fruits] Fruits are round and flattened, black at maturity with a toothed, winged membrane (hence the common name) formed around the edges.

Notes:

Winged Pigweed is a scrappy plant of sand prairie and can become weedy in such places as abandoned industrial lots and pavement cracks along highways. An efficient "tumbleweed" species, the small taproot easily breaks free from the fine fiberous roots, sending the round, spidery top across an open landscape, scattering seed along the way.

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More photos

Photos by K. Chayka taken in Ramsey County. Photos courtesy Peter M. Dziuk taken in Anoka and Ramsey counties.

Comments

Have you seen this plant in Minnesota, or have any other comments about it?

Posted by: Arthur G. - Duluth
on: 2016-09-19 04:10:40

Saw small individuals of this plant in the dunes at Point Park, Duluth. The young fruits were quite red.

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