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The series Californicaeis a natural grouping of Iris species native to Oregon, Washington and California. Natural and experimental hybridization is characteristic of the series which has led to confusing taxonomies for some species. Populations of species belonging to this series and found on the northwestern slopes of the Siskiyou Mountains cf southwestern Oregon and adjacent California were investigated. Methods used 2 were numerical classification techniques for morphological charactersdoi:10.15760/etd.5042 fatcat:ic2s4b54ibdu5kvktktcg366qu