bial 
the Indiana Academy of Science, Vol. 11, page 142, and Vol. 12, page 299, I 
have previously expressed the opinion that the species in question is 
pagodefolia. If this is true, this southern form came into our area along 
the valley of the Mississippi, and a species which is a large and valuable 
“timber tree in the river-swamps of the Yazoo basin, Mississippi, and of 
Wastern Arkansas’ might reasonably be expected in the low, wet bottom 
lands of the lower Wabash Valley. The Indiana station represents the 
northeastern limit of the species, a fact reflected in its sparing occurrence 
and reduced size. Deam’s collection of 1915 show the occurrence of this 
species in Jefferson County. 
The Yellow Hackleberry (Celtis Mississippiensis Bose.) is frequent or 
common along streams and in the lowlands of Gibson, Knox and Posey 
counties. It is a southern and western form, reaching a height of from 60 
to 80 feet and a diameter of from 2 to 3 feet in the basin of the lower Ohio 
River. In Indiana which represents its northern limit the tree “is inclined 
to grow scrubby and crooked.” {Deam.) It is medium sized, rarely 
exceeding a diameter of 18 inches. Its occurrence within our area is 
easily explained, since the counties named are not especially far removed 
from the center of its maximum development both as to size and numbers. 
It is a little difficult, however, to explain why it has not spread more widely 
in the State. 
The Southern Thorn (Crategus viridis Linnzus) is distinctly southern 
and somewhat western in its mass distribution, reaching its greatest abun- 
dance and largest size in western Louisiana and eastern Texas. It is found 
along stream borders and the margins of Swamps in moist soils, doubtless 
finding it way into our area when such conditions were practically con- 
tinuous. 
The Shining Thorn (Crataegus nitida (Hng.) Sargent) is said in Sar- 
gent’s “Trees of North America” to occur on the “bottoms of the Mississippi 
River in Illinois opposite the city of St. Louis.” The species cccurs in rich 
bottom lands in both Gibson and Posey counties in fair abundance as a 
small tree, from 20 to 30 feet high and with a broad and handsome crown. 
As a resuit of the recent work in the segregation of species in the genus 
Crategus it is practically impossible to form any definite notion as to the 
range of any particular form. Much field work will be necessary before 
we can determine just what species of this puzzling genus are members of 
our flora. No opinion is expressed, therefore, regarding the source from 
a © 
‘Sargent. Op. Cit. 245. 
