Panicles nodding distally; branches flexible; pulvini inconspicuously
or conspicuously hairy, hairs confined to the adaxial side of the branches.
Tridens flavus var. flavus grows in old fields and open woods. Its
range extends to Nuevo Léon, Mexico. It was discovered for the first time
in Canada in 1976, growing along a railway track in southern Ontario.
From Flora of Indiana (1940) by Charles C. Deam
Infrequent to frequent or even locally common. Possibly absent in a few counties where the soil is neutral and there are no sandy areas. It prefers open, sandy soil; and it is usually most abundant in prairie habitats.