VESTAL: A BLACK-SOIL PRAIRIE STATION 357 
MIXED CONSOCIES OF MESOPHYTIC PRAIRIE-GRASS, WEST OF 
ELMHURST 
i, ld Andropogon scoparius, x lf Eryngium yuccifolium, h, ch 
a, ld Andropogon furcatus, ch i Dodecatheon Meadia, h, ch 
f, ld Sorghastrum nutans, ch i Galium sp. 
f, ld Panicum sp., near P. nitidum i Solidago canadensis 
li Stipa spartea lf Solidago rigida, x 
f, ld Sporobolus heterolepis, ch lf Aster Novae-Angliae, ch 
i, ld Poa compressa, ruderal ? lf Antennaria plantaginifolia 
If Carex sp. f, ld Silphium terebinthinaceum, ch 
lf Juncus sp. lf Parthenium integrifolium, ch 
li Sisyrinchium sp. i Ambrosia artemisitfolia 
lf Rosa humilis i Rudbeckia hirta, ch 
la Euphorbia corollata, x i Lepachys pinnata 
i Viola pedatifida, ch 
Fic. 5 Fic. 6 
FIG. 5. Mesophytic prairie-grass at the county line station. The boundary 
iS seen between the area regularly cut over for hay, and the siuiiabathed Silphium 
terebinthinaceum consocies, in which Allium cernuum is abundant and conspicuous. 
* 6. The Liatris spicata consocies of the swamp prairie or fen association. 
The Silphium terebinthinaceum consocies is very distinctive in 
appearance, as the principal dominant is so conspicuous. Grasses 
