Abstract: Background & Aim: A high-quality checklist is of great significance to plant taxonomy, ecology, geography, and the utilization of plant resources. Unfortunately, since the 1980s, the checklist of Jilin Province has not been fully updated for a long time, which has seriously hindered related research. This paper attempts to obtain a credible province-wide checklist and county-level plant distribution data. Method: The TNRS (Taxonomic Name Resolution) was used to correct the spelling of scientific names. And the scientific name adopts the viewpoints in the Catalogue of Life China (2024). The checklist mainly refers to documents, i.e. Catalogue of Life China (2024), Key of Distribution Atlas of Northeast China Plant, Flora of Jilin Province（Vol.1、2）, Species and Distribution of Organisms in Jilin Province, Biodiversity of Jilin Province Funga |Flora| Fauna Flora ( Vol. 5、7)， Key of Plants of Northeastern China(2nd), Flora Plantarum Herbacearum Chinae Boreali-Orientalis, some articles and specimen data (from NSII, GBIF, NEFI, NEAU, IFP) to locate the species distribution in county-level divisions. Results: The checklist includes 2,664 species (subspecies, varieties) of vascular plants in Jilin Province, belonging to 142 families and 739 genera, with voucher specimens available for 2,184 species. Among them, there are 22 lycophytes (2 families, 6 genera), 103 ferns (16 families, 40 genera; including subspecies and varieties), 26 gymnosperms (4 families, 9 genera; varieties), and 2,513 angiosperms (120 families, 684 genera; subspecies and varieties). The most species-rich families are Asteraceae (76 genera, 283 species), Poaceae (65 genera, 195 species), Cyperaceae (14 genera, 177 species), Rosaceae (32 genera, 146 species), and Ranunculaceae (18 genera, 135 species). Other records are supported by reliable data.This checklist shows remarkable differences in species distribution among counties in Jilin Province. About 14 percent of 61 counties have more than 1,000 species, and the county-level distribution data are seriously unbalanced. Conclusions: The provincial checklist is reliable, but the quality of county-level distribution data needs to be significantly improved.

Key words: Jilin Province, tracheophyte, plant taxonomy, biodiversity, checklist