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30 <br /> <br />Mapping <br />Notes on the flood zone, riparian, and upland vegetation on the Yampa <br />River corridor were made on all trips. Major vegetational boundaries were <br />drawn onto a river map as they were observed from the raft. These notes, <br />together with the aerial color slides taken in the September helicopter <br />flight, were used to prepare a map of the stream-side vegetation, using USGS <br />7.5' topographic maps as a base. The upland and riparian vegetation were <br />mapped as major community types. The flood zone on the other hand was <br />mapped according to dominant species, since yearly flooding prevents the <br />formation of distinct communities. <br />Plant Collections <br />Specimens from plant collections made on all four trips to the Monument <br />were pressed and returned to the University of New Mexico for <br />identification. Several hundred plants were collected over the study <br />period, but an attempt was not made to prepare a complete flora of the <br />region. All specimens encountered on vegetation transects were identified, and <br />are listed in the Appendix to this report. Nomenclature follows that of <br />Harrington (1964). <br />