Page 195 
that annoying pest of these regions—the prairie fly,* In 
these thickets the more common productions are the hazle, 
( Corylus Americana ,) three species of sumach, (Rhus glabrum . 
R, copalinum . and R^. aromaticum .) several dwarf kinds of 
plumb, ( Primus ,) of which the species were not ascertained, 
two or three varieties of dogwood, (Cornus sericea , C, asperi - 
folia, C. alba . &c.,) several species of undetermined willows, 
( Salix .T" Besides these, may be mentioned the Amorpha fruti - 
cosa , Zanthoxylum fraxineum . (prickly ash,) Prinos verticillata . 
Ilex prinoides . Aronia melanocarpa . Spiraea tomentosa and S, 
salicifolia . Symphorea racemosa , Cephalanthus occidentalis , Rubus 
* Long foot note omitted. 
Page 196 
4 
villosus . (blackberry,) Ribes rotundifolium . called Illinois goose¬ 
berry, of which the fruit, though spinous, makes a delicious tart; 
together with various species of wild roses, grape-vines, &c. 
Though not properly falling within the compass of this 
communication, the object of which has been to give some 
account of the autumnal botany of the prairies, yet before I 
close it, I will venture to add a few remarks on the forest 
trees of Illinois. These, in the main, do not differ from the 
productions of similar districts in the timbered lands of Indi¬ 
ana, Ohio, Kentucky, and Tennessee. In Illinois, the richest 
groves, interspersed through the prairies, are constituted 
mainly of the same kind of trees which indicate the best soils 
generally in the Western States, as black walnut, hickories, 
hackberrv, (Celtis crassifolia .) sugar-maple, pawpaw, (Porcelia 
triloba .) &c. The thinner lands are clothed chiefly with 
oaks of various species, hickories and gums, ( Liquidambar 
(Footnote continued from Page 195 omitted.) 
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