Montana Field Guide

DRAFT: Requesting feedback on the 2026 revised rank, factors, and State Rank Reason outlined below and in the Conservation Status Rank Report. Eriophorum chamissonis is an uncommon species of fens across western and central Montana. Occurrences are almost entirely on publicly managed lands, including many on National Forest lands managed for multiple use. Several dozen occurrences are protected within Glacier National Park or within designated wilderness areas. Population levels appear to be relatively robust based on the available though limited data. Trends are unknown though populations have likely been relatively stable in the recent past or experienced only minor declines. Climate change may negatively affect this species over the next several decades. However, the timing and magnitude of potential impacts are largely unknown. Although climate change is listed as a potential threat to the species, it does not affect the overall threat rank or scoring, or the final subnational rank. Survey and monitoring data are needed to be able to more precisely determine population levels, assess condition and for assessing population trends.