Alleghanian—Ozark Distriet: Kentucky-Tennessee. 505 
ven), 333 birches, 858 Lirioden- 
207 were Robinia pseudacacia, 330 were maples (species not gi 
i The percentage of hardwoods is 
f 
dron tulipifera, 939 were pines and 167 were Tilia americana, 
therefore about 88 percent. The record) shows that most of the trees were © large size, the 
oaks for example ranging in diameter from eighteen to sixty inches (46—152 cm). 
The early settlers in southern Indiana found the country one vast forest 
broken only by the wind swept streak ofthe cyclones or the marshy land of 
the prairies. Juglans nigra was abundant in this forest and on the hills back 
of the Ohio River, Fagus americana was abundant forming an almost exclu- 
sive growth. Elsewhere the forest was of the mixed type and an enumeration 
in 1876 showed the following percentage’): 
Fagus americana Sweet . . . . 35 per cent Juglans nigra L.. «© » » . . .. 5 per cent 
Quercus (several species) . . . 18 >» >» CaryaalbaNutt.(=HicoriaovataMill) 5 >» >» 
Liriodendron tulipifera L. . - . 10 » » |Platanus oceidentalis L.. = .....:.3:2..3 
Acer nbum L.L ..... er Aesculus glabra Willd.. . . - en 
Acer saccharum Marsh Aesculus flava Ait, ER 
Fraxinus americana L. . . » mus americana L. AI 
Fraxinus quadrangulata Michx. . "2.1 Other species . ar BEE 
100 
trees of this forest, we need but note the follo- 
To appreciate something of the size of the 
t) 
wing (measurements in feet): uch 
3 Height to | Total: 
Diameter | first Limb | Height 
uercus macrocarpa Michx. . 2; 72 160 
Onkreus ba LE. „. - .. 00.0 m ran 6 60 150 
Quercus tinctoria Bartr. (= Q. velutina Lam.) 6,5 75 165 
Quereus ubra LL . . . » 7 94 181 
jenen. 2. ann 7 74 155 
Populus monilifera Ait. (= P. deltoides Marsh.) . 8 91 190 
Acer saccharum Marsh.” . : » v2... 5 62 120 
Perhaps of the same floristic constitution is the most remarkable aggrega- 
tion of trees in the north temperate zone found in the lower Wabash 
Valley in Illinois where the number of indigenous species south of the mouth 
of White River is one hundred and seven. This forest may be considered to 
represent the most northern extension of hardwood bottom forests of the Ar- 
kansas-Louisiana District where they have already been described’). 
The dry bottom-land on the Illinois side of the Mississippi River‘) 
opposite St. Louis is characterized by a sandy soil which supports a rich and 
diversified vegetation. The principal trees in places that are wooded comprise 
Quercus tinctoria, Q. imbricaria, O. macrocarpa, O. Muhlenbergü (= Q. acu- 
ninata), Acer saccharinum (= 4. dasycarpum) and Ulmus Julva. The wet 
1) HoTcHkIss, JED.: GARDEN and Forsst, V.; 155. March 30, 1892. 
2) CoULTER, M. S., Botanical Gazette I; 15. 
) See ante Arkansas-Louisiana District (Ch. 2. D. page 455) Hardwood Bottom Formation. 
) Hus, Henri: An ecological Cross Section of the Mississippi River in the Region of St, 
ı9th Annual Report Missouri Botanical Garden 1908: 127—258. 
> 0 
Louis, Mo. 
