Abstract: This is a checklist of vascular plants documented between 2019 and 2023 on the Coal Mine Spring property owned by Arizona Game & Fish Department and managed by Arizona State Parks. The study area comprises 4307 acres in central Santa Cruz County, including most of Coal Mine Canyon and parts of Ash Canyon, Cieneguita Canyon, and the Grosvenor Hills, as well as Coal Mine Spring, George Wise Spring, and Mata Siete Spring. The property was purchased by AZGFD between 2004 and 2007 to preserve native grassland and protect a population of Gila topminnow. Collections were made under permits from AZGFD and AZ State Parks.