Montana Field Guide

Musineon vaginatum is a regional endemic of Montana and Wyoming. Plants are found on rocky, limestone or calcareous soils predominantly in the Bridger Mountains, Pryor Mountains, and Bighorn Mountains in Wyoming and perhaps also on the Montana side. Populations are also present in western Montana near Missoula and the northern Bitterroot Valley where they are associated with Pseudotsuga menziesii (Douglas-fir) forests. Overall, the species' habitat appears to largely be intact and in good condition. Threats to the species have not been identified. Shifts in climate may negatively impact Musineon vaginatum over the next decade or longer, particularly from the effects of increased temperatures, and/or increased frequency and severity of droughts. However, impacts from a shifting climate remain unknown. The conservation status rank of S3S4 indicates uncertainty in rarity, threats, and/or population trends. Surveys that bring forth information on distributions, population counts, habitat quality, and assess for potential threats is greatly needed to determine an accurate state rank. Monitoring of a subset of populations across its state range is also essential for evaluating potential trends.