Robert W. Freckmann Herbarium


  Vincetoxicum nigrum (L.) Moench image
Photographer: Kitty Kohout           

Botanical Illustration

S. Kelly Kearns

S. Kelly Kearns

Kurt Stüber
Family Asclepiadaceae
Vincetoxicum nigrum (L.) Moench
black swallow-wort
Vincetoxicum: from vincere for "to conquer" and toxicum for "poison," referring to original species of Cynanchum (genus in same family) supposed curative powers
nigrum: Latin for "black"
  Prohibited/Restricted Invasive - Eradicate!  Stop It symbol- click for definition
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - locally established; ecologically invasive
Plant: climbing, perennial, 3'-6' tall, herbaceous vine in dense, tangling, thickets; stems hairy; roots a dense, knobby mass
Flower: purple-black to dark red, 5-parted, 1/4" wide, the petals triangular, fleshy, with tiny hairs on the top; inflorescence with mostly 6-10 flowers in umbel-like, stalked, branched cluster (cyme); blooms May-Aug.
Fruit:long narrow, thin pods with many seeds on silky hairs
Leaf:2"-5" long, opposite, toothless, oval to heart-shaped with a pointed tip, dark green, smooth, shiny, short-stalked
Habitat: full to partial sun; uplands, disturbed sites, woods edge
Notes: to eradicate: remove and burn all pods; treat growing foliage with surfactant mixed with triclopyr or glyohosate; monitor in late fall
(Glossary)

More Information Natural Communities Herbarium Specimens
All Vincetoxicum list Google- Images or Text
Synonyms 
Asclepias nigra L.
Cynanchum louiseae Kartesz & Gandhi
Cynanchum nigrum (L.) Pers.

         
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