PLANTS FOUND IN THE RAVINES 



The ravines along Lake Michigan are unique ecological habitats within 

 Illinois, and they contain a large number of species of plants. The fol- 

 lowing lists, the first of trees, shrubs, and woody vines and the second of 

 wildf lowers and other herbaceous plants, contain all species of gymnosperms 

 (cone-bearing plants) and flowering plants known to occur in the ravines in 

 Highland Park or that are likely to be found there. The lists are arranged 

 alphabetically by scientific name and contain the following information — 

 scientific name; common name; indication of whether the plant is native or 

 introduced from elsewhere; habitat within the ravines where the species 

 occurs; relative abundance in the ravines; and, when possible, months when 

 the species is in flower. 



A substantial amount of field work has been done in the ravines this 

 spring and summer, and most of the species in the lists have been observed 

 during these studies. Those species marked with an asterisk (*) were not 

 seen during the field work, but they have been reported to occur in ravines 

 along Lake Michigan in Illinois; field work will continue through the fall 

 to try to establish the presence of these species in Highland Park. 



Trees, Shrubs, and Woody Vines 



Acer negundo . Box-elder. Native. Slopes, especially toward Lake. Common. 



Acer nigrum . Black Maple. Native. Slopes. Common in some ravines, very 

 similar to Sugar Maple. 



Acer platanoides . Norway Maple. Introduced from Europe. Seeding into 

 ravines from trees cultivated in yards and parks. 



Acer rubrum . Red Maple. Native. Infrequent toward top of slope. 



Acer saccharum . Sugar Maple. Native. Slopes. Common. 



Amelanchier arborea . Shadbush, Juneberry, Serviceberry. Native. Slopes. 

 Occasional. April-May. 



Berber is thunbergii . Japanese Barberry. Introduced from Asia. Slopes and 

 bottom. Common. 



Betula lutea . Yellow Birch. Native. Slopes. Rare. 



Carpinus caroliniana . Ironwood, Blue Beech, American Hornbeam. Native. Slopes. 

 Frequent. 



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