Underlaying map was created using QGIS Development Team, 2013. QGIS Geographic Information System. Open Source Geospatial Foundation Project. http://www.qgis.org/ Displayed Data obtained from Jānis Rukšāns: Crocuses. A complete guide to the genus. Timber Press, Portland London 2010; Wikipedia articles (en,de,ru, fr, es), Flora of China (http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=111902)
