08 November 1968.
Story County, Iowa, United States
Locality: Located 2.0 miles west of McCallsburg along railroad right-of-way, just east of intersection on south side of road.
Coordinates: 42.1660, -93.4247
(Map it)
Elevation: 329m.
Habitat: Wild Habitat
Comment: Seed heads are set on tip of main stem in compact bunches or clusters. Few occur below top few inches of stem. Branching among plants varies from slight to considerable. Seed from few plants.