Lectotype of Erigeron rigidus Fr. (UPS). Courtesy of the Museum of Evolution, Uppsala University.
Part of: Sennikov AN, Kozhin MN (2023) Taxonomic revision of the Erigeron acris group (Asteraceae) in Murmansk Region, Russia, reveals a complex pattern of native and alien taxa. PhytoKeys 235: 83-128. https://doi.org/10.3897/phytokeys.235.111020