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Cirsium discolor (Muhl. ex Willd.) Spreng.
USDA Symbol: CIDI
USDA Native Status: Native to U.S.
Field Thistle is a member of the aster family (family Asteraceae) which includes herbs, sometimes shrubs or vines, rarely trees, with simple or compound, alternate or opposite leaves. Flowers small, but organized into larger heads resembling a single, radially symmetrical flower cupped by a ring of green bracts. Flower-like heads: tiny, radially symmetrical central flowers form the disk; larger flowers around the edge, the rays, strap-shaped and resembling petals; however, all flowers in one had may be disk flowers or rays.
Plant CharacteristicsDuration: Biennial Habit: Herb Size Notes:
Height 80-200 cm. Fruit:
Brown Size Class:
Bloom InformationBloom Color: Pink , Purple
Bloom Time: Jun , Jul , Aug , Sep
AL , AR , CT , DC , DE , GA , IA , IL , IN , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , ND , NH , NJ , NY , OH , PA , RI , SC , SD , TN , VA , VT , WI , WV Canada: MB
, QC USDA Native Status: L48(N), CAN(N)
Growing ConditionsLight Requirement: Sun
Soil Moisture: Dry
BenefitUse Wildlife: Goldfinches are fond of this thistle seed.
Conspicuous Flowers: yes
Larval Host: Painted Lady
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
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Record Modified: 2012-12-07
Research By: TWC Staff