Check List of Hamilton County, Ohio, Plants. 199 
ae to 2 Wwd. CAOBRCK,. VISd OF ,.AAMILITON 
COUNTY, OHIO, PLANTS, EXCLUSIVE: OF .THE 
LOWER CRYPTOGAMS. 
By WALTER H. AIKEN. 
HAMILTON CouNTY in area is one of the smaller counties 
of the State of Ohio. It includes about three hundred and 
ninety square miles. The county is remarkably well watered 
and fertile. The underlying rocks of the Miami country are 
calcareous, and even the drift gravels are usually composed 
largely of limestone. From both of these sources fertilizing 
elements are imparted to the soil. 
The low water in the Ohio River at Cincinnati is 431.96 
feet above the mean tide at Sandy Hook, and the hills on the 
Ohio side (Walnut Hills, College Hill, and Price Hill) rise 
from 450 to 470 feet above the river. 
The latitude of Cincinnati (the old Observatory) is 39° 6’ 
26” N., its longitude 84° 28’ W. 
The surface of the county is drained by many small rivers 
and streams, the principal being the Big Miami, Little Miami, 
Dry Fork of Whitewater, Mill Creek, Duck Creek, Taylor 
Creek, and Blue Rock Creek. 
North of the present city limits is a spacious basin or 
amphitheater of about twenty-five square miles, into which 
the suburbs are fast extending. As the city and its suburbs 
are thus expanding, the ponds and morasses of years ago are 
fast disappearing, and a great change in the flora of this 
region has resulted. 
The climate of the county is mild and genial. The average 
mean temperature of the year is 52.5° Fht. The average 
annual rainfall in the last thirty-three years has been 38.36 
inches. 
In the following check list many new accessions to the 
Cincinnati Flora will be noticed, largely attributable to the 
numerous railways which center here from all parts of the 
continent, and possibly to the accidental importation of seeds 
of weeds mixed in among the seeds of foreign garden plants. 
Jour. Cin, Soc. Nat, HIst., VoL. XX, No, 4.) I PRINTED MAY 5, 1904. 
