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'~ L <br /> <br />54 <br />Dittberner and Bryan[ <br />Within each descriptor, [here are. classes. or ranks of information <br />called descriptor states. The descriptors and descriptor state <br />definitions are listed in the appendix (Noires, and Sims, 1977). <br />Care must be exercised in interpreting the results of a PIN <br />query. Where possible, definitions were used that are commonly <br />accepted in the plan[ ecology, range science, and revege[a[ion Fields <br />. of expertise. However, because the descriptor states must be mutually <br />exclusive this was not always possible. In these cases, working <br />definitions as noted in the appendix were used. <br />A brief list and description of some of these descriptors follow <br />this description includes descriptors that will be of most interest <br />or chose which may cause some confusion or misinterpretation. <br />Taxonomic <br />' The taxonomic descriptors include [he division, family, genus, <br />;. species, infraspecific names.and.commorc.names for eath•one-of the •• <br />~ ~ species~in the system. Most of this taxonomic information came from <br />' local floras and botanical 1lterature. The infraspecific names may <br />be varieties or subspecies. The common name descriptor information <br />came from a ranked order of references. The first reference used was <br />Plummer (1976), the Intermountain Range Plant Symbols. If Plummer <br />~ did no[ have a common name for the species in PIN, then Kelsey and <br />~ Dayton (1942), Standardized Plant Names was used. If neither of these <br />1. two sources had a common name then Beetle's (1970) Recommended Plant <br />.~ Names was used. <br />Geographic <br />The geographic category of descriptors in PIN include origin, <br />I~~ counties, and minimum and maximum elevations at which [he vouchered <br />;f collections of that species has been found in each of the three <br />;. states. The county location al information is of two levels of <br />reliability. A county "present" record means that the species has <br />a vouchered specimen collected and stored in one of the four herbaria <br />listed above. A county "reported" record means that a reliable <br />source has reported [he species' occurrence in that county, but no <br />specimen was collected. <br />,Nii <br />Sf <br />:3, <br />:~G <br />;y.~ <br />~~ <br />i" <br />t <br />.. <br />