Table 2. Most frequently sampled plant species in nine Illinois hill prairies.



SpeciesPercent of plots Average cover (% total area)
Schizachryium scaparium 64.630.49
Bouteloua curtipendula62.4 13.50
Petalostemum purpureum37.1 3.41
Panicum spp.29.8 2.68
Aster azureus29.25.29
Andropogon gerardii27.525.90
Psoralea tenuiflora27.5 12.24
Solidago nemoralis22.5 3.14
Melilotus alba18.0 9.05
Aster ericoides16.3 9.81
Senecio plattensis16.3 0.37
Rhus glabra15.7 27.60
Cornus drummondii15.2 14.38
Euphorbia corollata 15.2 1.47
Ambrosia artemisiifolia14.6 12.55
Cassia fasciculata14.0 4.48
Eupatorium altissimum13.5 2.74
Aster patens12.9 2.47
Ruellia humilis12.9 0.96
Juniperus virginiana11.2 20.60
Kuhnia eupatorioides10.7 2.57
Asclepias verticillata10.7 2.12
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