Chamaecrista fasciculata (Michx.) Greene
other common names: golden cassia, large-flowered sensitive pea, prairie senna pea, wild sensitive plant
Chamaecrista: from Greek, meaning "low crest"
Fasciculata: meaning “of bundles"
Legume family: Fabaceae (Leguminosae)
Photograph by Thomas Rosburg, Wildflowers of the Tallgrass Prairie: The Upper Midwest, Second Edition