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2 96811 Asclepias syriaca L.
T.F.L. Nees von Esenbeck, F.KL. Spenner, A. Putterlick, J.X.R. Caspary, Gen. Fl. Germ., vol. 5 fasicle 21, (Conspectus): , fig. 12-26a (1845)
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