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• <br />n <br />U <br />Figure 5. Known distribution of Spiranthes diluvialis in western North America by TNC <br />ecoregion (adapted from Stein et al. 2000), circa July 2005. Only those ecoregions <br />containing S. diluvialis populations are mapped and labeled. UT- WYRMstands for <br />Utah - Wyoming Rocky Mountains. Locations are derived from natural heritage program <br />data and based on standardized element occurrence criteria of NatureServe (2004) (see <br />page 33 for discussion). <br />11 <br />