34 SANDUSKY IfLORA. 



are excluded from the catalogue under the rule given 

 above. On the other hand plants that are never culti- 

 vated in this region are included, even if merely 

 adventive. 



In nomenclature I have, in the main, followed the 

 Index Kewensis, giving in parenthesis the names used 

 in the sixth edition of Graj's Manual, in the few cases 

 vi^here those differ materially from the names of the 

 Kew Index. Names of species not native to this 

 part of the world, are printed in italics. An asterisk 

 indicates that the species is at present known to grow 

 in few, if any places in Ohio, except in the neighbor- 

 hood of Sandusky. 



Relative abundance is expressed by the following 

 terms in the order named ; rare, scarce, infrequent, fre- 

 quent, common, abundant. When standing alone or 

 coming first, they refer to Erie county as a whole. 





