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.
Atriplex truncata is known from several, widely scattered locations in the western half of the state. Historical collections are known from the Flathead/Mission Valley, Gallatin Valley, Helena Valley and the Paradise Valley. These represent about half of the known sites in the state, and they may no longer be extant due to development and habitat loss. Population numbers are poorly known, and the species is an annual, so populations likely fluctuate widely from year to year. However, the available data suggests that the population size is likely to be at least a few thousand plants. The species occurs in low elevation, alkaline wetlands. These sites may be impacted by non-native species and the wetland habitat impacted by shifts in climate. Additionally, as the sites are in valley bottoms and near areas of human activity and development, there is a greater chance of negative impacts from various activities and adjacent land use. Surveys are greatly needed to collect current