The ligules in both species tend toward orange or yellow-orange compared to the more clear yellow ones of many genera in this group.
1. Heads 1–5 (–6) on stems bearing (usually) at least 1 well developed bract or leaf; pappus consisting of more than 5 each bristles and scales.
K. biflora
1. Heads solitary on strictly naked scapes (often many scapes per plant); pappus consisting of 5 bristles and 5 scales (the latter outside and alternating with the bristles).
K. virginica
All species found in Krigia
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 1, 2021. https://michiganflora.net/genus.aspx?id=Krigia.