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V
PREFACE.
the investigation of cryptogamic plants that reproduce by spores, such as fungi plants in their very places of birth provides.
Regarding the establishment of this work itself, I have built it upon my dissertation: Attempt at a Methodical Disposition of Fungi. Leipzig 1797. as a base, sometimes changing the genera—those which, in the interim, until they were confirmed as diverse through more accurate observations, I inserted as families related to the genera; others I added as new, just as the science, increasing daily, demanded.
I have admitted only those species which I either possess myself, or for which faithful illustrations were present, which, taught by experience, I could consider as such, among which the illustrations of Bulliard and Sowerby are deservedly to be numbered, for which I have composed both differences and brief descriptions. I also deemed those species not to be overlooked, from whose descriptions it is clear that they possess peculiar