OFFICIAL ORGAN OF THE KANSAS CITY ACADEMY OF SCIENCE. 
VOL. V. 
KANSAS CITY, MO., NOVEMBER, 1891. 
No. 11. 
Written for the Scientist. 
Distribution of the Trees, Shrubs 
and Vines of Jackson County, 
Missouri. 
By B. F. Bush, Courtney, Mo. 
If we draw an irregular line from 
about eleven miles north of the soutli- 
w^est corner to a point twenty- three 
miles north of the southeast corner 
of Jackson county, we have divided 
the county into two almost distinct 
floras, which, as the further we leave 
this irregular line, the more the as- 
pect of the vegetation differs, until 
we reach the north and south bound- 
aries. 
The principal forest growth of 
this county are the oaks, and in the 
species of this genus there is a dif- 
ference of habit that at once attracts 
the attention. The white oak ( Quer- 
cus alba) is perhaps the most com- 
mon species, being very common 
north of this line, but not so much 
so south; the scarlet oak ( Q. coccinea) 
is common south, but not known 
north; black oak (§. tinctoria) is 
common south, but very rare north; 
burr oak (§. 7naGrocarj)d)^ and yel- 
low oak ( Muhlenhergii) are com- 
mon north, but not so south; swamp 
white oak ( hicolor)^ and chestnut 
oak (§. Prinas) are rare north, and 
not known south of this line; prairie 
oak prinoides)^ and black jack 
oak ( Q. nigra) are found only south 
of the line; shingle oak (^Q.imbrl- 
caria) is common south and rare 
north; post oak [Q. stellata) is also 
common south, and only occurs on 
one high wooded knob north. 
Between the scarlet oaks and the 
black oaks there does not appear to be 
very much difference, except that the 
leaves of the latter are rather thicker 
and fulvous beneath and hardly so 
deeply lobed, and the scales of the 
cup of the former are considerably 
squarrose, whilst those of the latter 
