▁ δ η λ ος ▁( del os ), ▁meaning ▁" ev ident ," ▁and ▁ ο ν υ ξ ▁( ony x ), ▁meaning ▁" c law ," ▁referring ▁to ▁the ▁pet als . ▁The ▁common ▁name , ▁Po inci ana , ▁comes ▁from ▁a ▁former ▁genus ▁of ▁the ▁same ▁name ▁in ▁which ▁the ▁members ▁of ▁the ▁current ▁genus ▁Del on ix ▁were ▁class ified ▁along ▁with ▁plants ▁now ▁placed ▁in ▁the ▁genus ▁Ca es al pin ia . ▁ ▁Selected ▁species ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Category : F ab aceae ▁gener a <0x0A> </s> ▁The ▁Illinois ▁River ▁() ▁is ▁a ▁principal ▁trib ut ary ▁of ▁the ▁Mississippi ▁River ▁and ▁is ▁approximately ▁ ▁long . ▁Loc ated ▁in ▁the ▁U . S . ▁state ▁of ▁Illinois , ▁the ▁river ▁dra ins ▁a ▁large ▁section ▁of ▁central ▁Illinois , ▁with ▁a ▁d rain age ▁bas in ▁of ▁. ▁The ▁d rain age ▁bas in ▁extends ▁into ▁Wisconsin , ▁Indiana , ▁and ▁a ▁very ▁small ▁area ▁of ▁south western ▁Michigan . ▁▁ ▁The ▁river ▁was ▁important ▁among ▁Native ▁Americans ▁and ▁early ▁French ▁trad ers ▁as ▁the ▁principal ▁water ▁route ▁connecting ▁the ▁Great ▁L akes ▁with ▁the ▁Mississippi . ▁The ▁French ▁colonial ▁settlement s ▁along ▁these ▁rivers ▁formed ▁the ▁heart ▁of ▁the ▁area ▁known ▁as ▁the ▁Illinois ▁Country ▁in ▁the ▁ 1 7 th ▁and ▁ 1 8 th ▁centuries . ▁After ▁the ▁construction ▁of ▁the ▁Illinois ▁and ▁Michigan ▁Canal ▁and ▁the ▁Hen ne pin ▁Canal ▁in ▁the ▁ 1 9 th ▁century