United States, Illinois, DeKalb Co., 1 mi. E of Nelson Road along the CNWRR [Chicago and Northwestern Railroad] tracks, just W of DeKalb city. T40N, R4E, Sec. 20.
41.9295 -88.7504
Degraded prairie remnant along right-of-way.
{"habit":"Perennial, one of ca. 25 plants of a hybrid swarm between Asclepias syriaca and A. speciosa, the latter considered adventive from the Great Plains."}