Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Slaughter
Swamps with deciduous trees, cedar, tamarack; springy river banks, stream borders and springs. Usually in places were seepage is coming to the surface.
The pedicels and usually rays of the umbel are ± scabrous or minutely hispidulous (as in Aethusa). Very local; recent collections are few.
The epithet "chinense" is a misnomer for this eastern North American native, as also Asclepias syriaca and Impatiens capensis.