In a well quantified southwest Michigan study (n = 1120 observations), Asclepias tuberosa, M punctata, Centaurea maculosa, Coreopsis lanceolata,
Tephrosia virginiana, E.
Common associated species of these dry sand prairies were Ambrosia psilostachya (western ragweed), Dichanthelium villosissimum (hairy panic grass), Opuntia humifusa (common prickly pear), and
Tephrosia virginiana (goat's-rue).
The legume Tephrosia virginiana is frequently found associated with the grassland-heath on Nantucket Island.
It is not known for certain that Tephrosia virginiana is an N-fixing species.
(rough blazing star), Sporobolus heterolepis (Gray) Gray (northern drop seed), and
Tephrosia virginiana (L.) Pers.