ABSTRACT
The vascular flora of a 12 ha successional prairie in Jasper County, Illinois was studied during the growing season of 1996. Abundance and flowering dates (initial, peak, and final) were determined for most of the species. Also, frequency (%), average cover, and importance value (IV = 200) of the taxa were determined using randomly located quadrats along line transects through the area. One hundred forty-four taxa were observed in the prairie, 35 monocots and 109 dicots, of which 20 were woody species and 10 introduced exotics. Andropogon gerardii (big bluestem) had the highest IV (44.97) followed by Cassia fasciculata (partridge pea), Euthamia graminifolia (grass-leaved goldenrod), Schizachyrium scoparium (little bluestem), Eleocharis intermedia (spike rush), and Solidago nemoralis (field goldenrod).