The District has a two-tier seed provenance system for purchase consideration of native plant material.  First-Tier priority is given to species with origins (provenance) from locations within the range map shown below.  Any materials that do not originate from the defined First-Tier Zone may be considered for purchase at the District’s discretion as long as vendor provides the materials’ geographic location (County & State) and distance (in miles) from Lake County in the “Notes” column found in the contract’s Schedule of Prices.