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The taxonomic identity of two neglected Sprengel names, Galinsoga megapotamica and G. uniflora (Asteraceae), with remarks upon Friedrich Sellow’s collections galore

. Phytotaxa. 438, 3 (Apr. 2020), 163–181. DOI:https://doi.org/10.11646/phytotaxa.438.3.1.