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As the number of observations submitted to the citizen science platform iNaturalist continues to grow, it is increasingly important that these observations can be identified to the finest taxonomic level, maximizing their value for biodiversity research. Here, we explore the benefits of acting as an identifier on iNaturalist.

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Eragrostis amurensis (type from Amur Oblast, Russian Far East) and E. voronensis (type from Tambov Oblast, Middle Russia) were separated from E. pilosa by the presence of glandular pits. The location of glands along with spikelet details was studied on specimens from Europe and N Asia; and E. voronensis is considered conspecific with E. amurensis. The newly circumscribed E. amurensis is a species of riverside habitats and is widely distributed in temperate Eurasia. It is recorded for the first time for Ukraine, Kazakhstan, and Mongolia. Eragrostis amurensis has recently invaded some areas of Eastern Europe and is still colonizing new watercourses. It is not synonymous with the robust glandular North American E. perplexa (type from South Dakota, U.S.A.) which has longer lemmas and more florets in each spikelet.

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