|
 |
Black Swallowwort (Cynachum louiseae) |
Color Photographs: U.S. National Parks Service
|
Black Swallowwort (Cynachum louiseae) Alien: Native of Europe. Identification: Plant a vine. Flowers purple-brown with 5 petals and arranged in small clusters arising from the leaf axils. Fruit an elongate, pointed pod containing flattened seeda topped with silken parachutes. Stem hairy. Leaves elongate, triangular, arranged in opposite pairs. Plant 3 to 6 feet in length. Distribution: Found scattered throughout the northeastern United States. Habitat: Black Swallowwort is found in fields and along roadsides. Flowering period: June to September. Note: This species has been known as Cynachum nigrum.
Line Drawing: Britton, N.L., and A. Brown. 19 13. An Illustrated Flora of the Northern United States and Canada, Second Edition.
|
Black Swallowwort (Cynachum louiseae)
Similar Species: The milkweedlike pods and vine structure are distinctive characters for Black Swallowwort. |
Similar Species No Similar Species |
 |
