(Crovello et al., 1983), which provide concise lists of an area’s plants 
without miscellaneous information. 
A second consideration is the degree of bibliographic citation in 
the catalogue. Many checklists, including the Indiana work (Crovello 
et al., 1983) and the recent compilation for New York (Mitchell, 
1986), contain few to no references to the taxonomic literature to 
We have followed a format similar to that found in the popular 
catalogue for the flora of Arizona (Lehr, 1978). The present 
catalogue contains a complete list of Missouri’s flora, including 
subspecies, varieties, and forms. Useful information, such as common 
Great Plains and Illinois). 
Early in our work we realized that many botanists in the state 
were dependent on nomenclature of the excellent, recent floristic 
manual for the Great Plains (Great Plains Flora Association, 1986), 
which includes coverage of westernmost Missouri in its range. Many 
of the botanists interested in plants of eastern Missouri were using 
Mohlenbrock’s (1986) concise, inexpensive manual for Illinois, which 
technically does not cover Missouri, but contains most of eastern 
issouri’s flora. To accommodate these users and to provide a link 
be 
ynon 
information presented in the three-page Errata found in later 
access to these pages and because many of the co presented 
in them were not justified in print. We did not ignore the Errata, 
but rather attempted to verify these nomenclatural changes during 
Viii 
