Cycloloma atriplicifolium (Spreng.) Coult.
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TAXONOMY
 
Family: Chenopodiaceae
Genus: Cycloloma
 
Species Synonyms: Kochia atriplicifolia Spreng.
Common Names: winged pigweed
tumble ringwing
 
DISTRIBUTION
 
Canada: southeastern Saskatchewan – southern Manitoba – southern Ontario
Saskatchewan: southeastern Saskatchewan
Ecoregion: Mixed Grassland, Moist Mixed Grassland
 
HABITAT
 
Saskatchewan: sandy, dry soil
 
RARITY STATUS
 
Provincial Status According
to Harms (2003):
Endangered
Nature Conservancy Status:
G5 S1
Saskatchewan Species at
Risk Status:
None
COSEWIC Status:
None
 
Winged pigweed is endangered in Saskatchewan because it is extremely rare and is highly regionally restricted. This plant lives in fragile, sandy environments and may be sensitive to changes habitat due to human developments.
 
SPECIES DESCRIPTION
 
Height: 10 – 80 cm
Roots: taproot
Stem: annual, erect or spreading, bushy, freely branched, grooved, branches angled, woolly, not mealy, nearly hairless in age
Leaves: alternate, stalked, 6 – 7 cm long, 1 – 1.5 cm wide, inversely lance-shaped, base wedge-shaped, tip acute, margin coarsely toothed
Inflorescence: terminal, unbranched, like a string of beads, interrupted
Flowers: bisexual or female-flowered; perianth segments 5, fused; stamens 5; stigmas 3
Fruits: nearly spherical, enclosed in sepals with peripheral wing, pericarp free from seed; seed approximately 3 mm across (including wing), horizontal, black, bearing white silky hairs
 
CYCLOLOMA VERSUS CHENOPODIUM IN SASKATCHEWAN
 
Peripheral wing on sepals at maturity; plants woolly
Cycloloma
No peripheral wing on sepals at maturity; plants commonly mealy
Chenopodium