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Asclepias verticillata L.
Whorled milkweed, Eastern whorled milkweed
USDA Symbol: ASVE
USDA Native Status: Native to U.S.
Whorled milkweed is a single-stemmed, unbranched perennial, 1-3 ft. tall. The narrow, linear leaves are whorled along the stem. Small, greenish-white flowers occur in flat-topped clusters on the upper part of the stem.
Because of its toxicity to livestock, this plant is considered a weed in range areas.
Plant CharacteristicsDuration: Perennial Habit: Herb Root Type: Tap Leaf Complexity: Simple Leaf Shape:
Linear Leaf Pubescence: Glabrous Leaf Apex: Acute Flower:
Flowers 2 mm
10 cm Size Class:
Bloom InformationBloom Color: White , Green
Bloom Time: May , Jun , Jul , Aug , Sep
AL , AR , AZ , CT , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , MI , MN , MO , MS , MT , NC , ND , NE , NJ , NM , NY , OH , OK , PA , RI , SC , SD , TN , TX , VA , VT , WI , WV , WY Canada: MB
, SK Native Distribution:
MA to MT, s. to FL & e. TX; also s. Canada Native Habitat:
Woodland USDA Native Status: L48(N), CAN(N)
Growing ConditionsWater Use:
Low Light Requirement:
Sun , Part Shade Soil Moisture:
Dry Soil Description:
Sandy, clayey or rocky soils. Conditions Comments: Whorled
milkweed is one of the more poisonous or the milkweeds to livestock. It is therefore considered a weed
in range areas.
BenefitWarning: POISONOUS PARTS: All parts. Toxic only in large quantities. Syptoms include, vomiting, stupor, weakness, spasms. Toxic Principle: Cardiac glycosides and resinoids. (Poisonous Plants of N.C. State)
Conspicuous Flowers: yes
Larval Host: Monarch
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
PropagationDescription: Plant seeds outside in the fall. Seedlings will germinate immediately but may not flower until the second year.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes
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Record Modified: 2009-02-19
Research By: TWC Staff