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Apocynaceae

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Asclepias verticillata L.

N. L. Owens
Asclepias verticillata L.

Gordon C. Tucker
Asclepias viridiflora Raf.

Gordon C. Tucker
Asclepias viridiflora Raf.

Gordon C. Tucker
Asclepias viridiflora Raf.

Gordon C. Tucker
Calotropis procera (Ait.) Ait. f.

W. E. McClain
Cynanchum louiseae Kartesz & Gandhi

Gordon C. Tucker
Cynanchum nigrum Cav.

Gordon C. Tucker and Edwin H. Horning
Macrosiphonia macrosiphon (Torr.) A. Heller

D.S. Seigler and Saupe
Matelea obliqua (Jacq.) Woodson

R. Athey
Trachelospermum difforme (Walter) A. Gray

Bob Edgin
Vinca minor L.

Gordon C. Tucker
Vinca minor L.

Gordon C. Tucker
Vincetoxicum

Gordon C. Tucker
Vincetoxicum nigrum Moench

Tad M. Zebryk