Aristolochia durior auct. non Hill

Dutchman's Pipe, Pipevine

Helianthus debilis Nutt.

Cucumberleaf Sunflower

Aristolochia clematitis L.

Birthwort

Aristolochia serpentaria L.

Virginia Snake Root, Virginia Snakeroot

Aristolochia tomentosa Sims

Woolly Dutchman's Pipe, Woolly Pipevine

Aristolochia contorta Bunge

Ma Do Ling, Northern Pipevine, Snakeroot

Aristolochia debilis Siebold & Zucc.

Ma Dou Ling, Slender Dutchman's Pipe

Aristolochia manshuriensis Kom.

Chinese Aristolochia

Aristolochia macrophylla Lam.

Aristolochia iberica Fisch. & C.A.Mey. ex Boiss.

Aristolochia littoralis D. Parodi

Helianthus debilis ssp. cucumerifolius

Helianthus debilis ssp. silvestris

Helianthus debilis ssp. tardiflorus

Helianthus debilis ssp. vestitus

Aristolochia trilobata L.

Aristolochia californica Torr.

Aristolochia coryi I.M. Johnst.