Collection Summary
Jefferson County has a total of 903 valid, non-duplicated collections representing 65 species and 148 localities. There are a total of 91 collectors and 181 collection dates for the county. This results in a total of 234 expeditions for the county, a measure of unique date / collector(s) combinations. The county's earliest collection year is 1893 and its most recent collection year is 2019. The earliest and latest collection dates (independent of earliest and most recent collection years) are February 2 and November 27, respectively. If you have a new record to report for Jefferson County, read the New Records section of the FAQ.