Geographic distribution of sites occupied by Crataegus sect. Douglasianae and C. sect. Salignae

<p>Geographic distribution of sites occupied by <em>Crataegus</em> sect. <em>Douglasianae</em> and <em>C.</em> sect. <em>Salignae</em> samples, together with those occupied by the <em>C.</em> subg. <em>Americanae</em> taxa with which comparison is made in Dickinson et al. (2021; Fig. 9). These sites are plotted on the map of the K&ouml;ppen-Geiger climate classification (Kottek et al. 2006; Rubel et al. 2017; see http://koeppen-geiger.vu-wien.ac.at/present.htm) and visualized using Google Earth Pro. Conversion of the specimen data to the Google Earth Keyhole Markup Language (.kml) was carried out using the EarthPoint exceltokml function (https://www.earthpoint.us/exceltokml.aspx; Clark undated).</p> <p>Clark, W. Undated. Earthpoint&mdash;Tools for Google Earth. Available online: http://www.earthpoint.us/ (accessed on various dates 2015-2021).</p> <p>Dickinson, T.A.; Yan, B.X.; Han, S.;&nbsp; Zarrei, M. Niche Shifts, Hybridization, Polyploidy and Geographic<br> Parthenogenesis in Western North American Hawthorns (<em>Crataegus</em> subg. <em>Sanguineae</em>, Rosaceae). Agronomy 2021, 11 (in press).</p> <p>Kottek, M.; Grieser Jr Beck, C.; Rudolf, B.; Rubel, F. World Map of the Köppen-Geiger Climate Classification Updated. Meteorol. Z. 2006, 15, 259&ndash;263, doi:10.1127/0941-2948/2006/0130.</p> <p>Rubel, F.; Brugger, K.; Haslinger, K.; Auer, I. The Climate of the European Alps: Shift of Very High Resolution Köppen-Geiger Climate Zones 1800&ndash;2100. Meteorol. Z. 2017, 26, 115&ndash;125, doi:10.1127/metz/2016/0816.</p>