IAPT is pleased to announce the 2020 Stafleu Medal for an outstanding publication on historical, bibliographic, and/or nomenclatural aspects of systematics and taxonomy. For this award the Stafleu Award committee considered papers published in 2017-2018. The 2020 Stafleu Medal is awarded to: Kathryn Mauz for her 2018 book, C. G. Pringle: Botanist, Traveler, and the “Flora of the Pacific Slope” (1881–1884), Memoirs of the New York Botanical Garden 120, Heritage Series 3: i–xxi