In most cases where our treatment differs nomenclaturally from 
any of the three cited floras, a bibliographic citation to pertinent 
literature in support of our view is given. References are compiled 
in a cumulative bibliography. Miscellaneous taxonomic comments 
refer primarily to those instances in which we were unable to find 
previously unpublished plant names or combinations, nor does it 
include reports of taxa whose presence in Missouri has not been 
published elsewhere first. In addition, users should note that we have 
not provided documentation for corrections and changes in spelling, 
author citation (author abbreviations follow Halliday et al. (1984) 
where possible), or common names, although a substantial number 
of such changes are present. 
HOW TO USE THE CATALOGUE 
The taxa included in the catalogue are alphabetized by family, 
species, subspecies, etc., within the major taxonomic groups. Note 
that taxa excluded from the flora are listed at the end of the 
taxonomic list, just prior to the bibliography. In an attempt to 
account for all of the binomials presently applied to Missouri species, 
a list of the named hybrids is also included following the main body 
of the catalogue. The genera of ferns and fern allies are included in 
families according to the system of Tryon and Tryon (1982), while the 
flowering plant genera (separated into dicots, then monocots) are 
included in families according to the system of Cronquist (1981). 
The conifer families are as in Steyermark (1963), because no better, 
comprehensive system of classification for gymnosperms is presently 
available. Changes in familial names and indications for those few 
genera transferred to different families are cross-referenced in the 
list, eliminating the need for an index to the catalogue. 
We have attempted to indicate introduced taxa, including hybrids, 
in the catalogue, although there are a surprising number of species 
a 
ambiguous taxa generally have been listed as native. To this extent 
we have undoubtedly erred in failing to recognize some introductions 
from surrounding states that accompanied the widespread habitat 
changes as Missouri was settled from the eastern United States 
during the past few centuries. 
