10 Binos OF ILLINOIS. 



As to dicotyledonous trees, it may be said that while only 3 species 

 (t e., wild red cherry, l'runu» pennsiih-ariira; cork elm, Ulmus raef- 

 mosa, uud paper or canoe birch, BttuUi papi/racea,) are confined to 

 the northern portion of the State, at least 33 species are restricted 

 mainly to the southern half, the following coniprisint; the latter 

 list: Cucumber tree {MitijiitilUi acuminata), umiirella tree (M. um- 

 brella), tulip tree (Llriodemlron tulipifera)* , deciduous holly {lUx 

 tlec'ulua). Indian cherry {lihamuus caroiiniana), black locust (liohinia 

 pseudacdcia), water locust (Gliditschia moni)gpcrmii)\, Chicasaw plum 

 {Prunus chicasa), Washinpton thorn {CraUegus cordata), tree haw- 

 thorn {('rat(f(jiis arhorcscens) , narrow-leafed cral>-apple (Fyrax tiiiiiun- 

 ti/ulla), sweet gum {Lupi'idamhar styracijlua), Hercules' club {Aralia 

 sjnnosa), tupelo gum (Xyssa unijlora), farklebeiTy (Vaccinium arbor- 

 eum), southern buckthorn (Bitmcrta lycioidcs), southern iron-wood (li. 

 lamtri'mosa), silver bell tree (llalcsia tctraptcra), western catalpa 

 (Catiilpa speeiosa), "privet" (Forcsticra acinninata), wiuped elm 

 {Ulmus alata), water elm {Planera aquatica), Mississippi hackberry 

 (Ccltis missisitippicnsis), water liickory (Carya tnjiiaticd), small shell- 

 bark (C. microcarpa), overcup oak {Qiicrrus lyruta), Spanish oak 

 (Q. falcata), willow-oak {Q. phvlhs), chinquapin {Castatiea pumila), 

 i)lack alder (Alnuii scrrulata), yellow pine {I'iitus viilis), white cedar 

 {Cliam((cy])(iris splucroidea), and bald cypress {Tujrodium distichum). 



The decidedly "Austroriparian" fades presented by the vegetation 

 of the southern counties (north to Wabash and St. Clair) is further 

 illustrated by the parasitic mistletoe (I'lioradi'iidron /larcxccns), the 

 arborescent grass, forest-reed, or switch-cane (Aruiidinaria teda), 

 and the large number of vines, besides the great luxuriance of vege- 

 tation generally. It will be best to treat of each section (so far as 

 the writer possesses the knowledge to do so), under a separate 

 heading, rather than to enter here into further details. 



The Lake Shore District (by E. W. Nklson.;) "The region 

 about tin: southern end of Lake Michigan, in Illinois, presents an 

 unusually fertile field for the ornithologist. Situated, as it is, mid- 

 way between the wooded region of the East and the treeless plains 

 of the West, with the warm river bottoms of the South, rich in 

 southern species, extending within a comiiaratively short distance, 

 and the great Lake upon the north, northeastern Illinois forms a 

 kind of "four corners" where the avian-faunie of four regions inter- 

 grade. To the proximity of Lake Michigan we are indebted for a 



• North to Vprmlllon iflde Trofesgor Forber, iii episl.) 



f North to Illinois River bottons, nenrtho mouth of that stream (Forbes). 



: In Bulletin of the Esisex Institute (Halem, Moss.), Vol. VIII, 1876, pp. 90-!)2. 



