Vincetoxicum nigrum (L.) Moench
Family: Apocynaceae
black swallow-wort
[Asclepias nigra L.,  more]
Vincetoxicum nigrum image
Kitty Kohout  
Etymology: Vincetoxicum: from vincere for "to conquer" and toxicum for "poison," referring to original species of Cynanchum (genus in same family) supposed curative powers
Plants: climbing, perennial, 3'-6' tall, herbaceous vine in dense, tangling, thickets; stems hairy; roots a dense, knobby mass
Leaves: 2"-5" long, opposite, toothless, oval to heart-shaped with a pointed tip, dark green, smooth, shiny, short-stalked
Flowers: 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.
Fruits: long narrow, thin pods with many seeds on silky hairs
Habitat: full to partial sun; uplands, disturbed sites, woods edge
Invasiveness: Prohibited/Restricted Invasive - Eradicate!
Conservation Status: Introduced - locally established; ecologically invasive
Vincetoxicum nigrum image
S. Kelly Kearns  
Vincetoxicum nigrum image
Botanical Illustration  
Vincetoxicum nigrum image
S. Kelly Kearns  
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Kurt Stüber  
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
Vincetoxicum nigrum image
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