included plants of depressions in the uplands that give rise to swampy 

 conditions, while many plants of the water's edge will be found in the 

 list of aquatics (q.v.). Swampy depressions in the morainic uplands 

 are common throughout the moraine deposits, and some of the best 

 examples of flood-plain associations may be seen along the Galien River 

 at Three Oaks, Mich., along the Illinois River at Starved Rock Park, 

 along the Des Plaines River at Riverside and River Forest, and along 

 the Chicago River at Edgebrook. 



Trees and Shrubs 



*Salix nigra Michx., black willow. 



" amygdaloides Anders., peach-leaved willow. 

 " longifoUa Muhl., sand bar willow. 

 Populus deltoides Marsh., Cottonwood. 

 Juglans cinerea L., butternut. 



" nigra L., black walnut. 

 Carya cordiformis K. Koch., bitter-nut hickory. 

 Quercus macrocarpa Michx., bur oak. 



" palustris Muench., pin oak. 



" bicolor Willd., swamp white oak. 

 Ulmus fulva Michx., slippery elm. 



" americana L., American elm. 

 Celtis occidentalis L.,ha,ckheTTy. 

 Morus rubra L., red mulberry. 

 Menispermum canadense L., moonseed. 

 Platanus occidentalis L., sycamore. 

 Clematis virginiana L., virgin's-bower. 

 Benzoin aestivale Nees., spice bush. 

 Ribes Cynosbati L., prickly gooseberry. 

 " floridum L'Her., wild black currant. 



* Crataegus punctata Jacq., punctate haw. 



* " mollis Scheele., red haw. 



" spp., haws or thorn apples. 

 Pyrus coronaria L., American crab. 

 Prunus serotina Ehrh., wild black cherry. 



" americana Marsh,, wild plum. 

 Gleditsia triacanthos L., honey-locust. 

 Cercis canadensis L., redbud. 



Gymnocladus dioica (L.) Koch., Kentucky coffee- tree. 

 Amorpha fruticosa L. 



Zanthoxylum americanum Mill., prickly ash. 

 Rhus Toxicodendron L., poison ivy. 

 Evonymus atropurpureus Jacq., waahoo or burning bush. 



" obovatus Nutt., strawberry-bush. 



Staphylea trifoUa L., bladdernut. 

 *Acer saccharinum L., white maple. 

 " Negundo L., box-elder. 



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