Taxonomy of the weed species of the genus Echinochloa (Poaceae, Paniceae) in Southwestern Europe: Exploring the confused current state of affairs Author Hoste, Ivan https://orcid.org/0000-0003-0603-7587 Meise Botanic Garden, Nieuwelaan 38, B- 1860 Meise, Belgium ivan.hoste@plantentuinmeise.be Author Verloove, Filip https://orcid.org/0000-0003-4144-2422 Meise Botanic Garden, Nieuwelaan 38, B- 1860 Meise, Belgium text PhytoKeys 2022 2022-05-23 197 1 31 http://dx.doi.org/10.3897/phytokeys.197.79499 journal article http://dx.doi.org/10.3897/phytokeys.197.79499 1314-2003-197-1 95688E227E3D529DBD2A8FC988E394B1 Echinochloa colona (L.) Link, Hort. Berol. 2: 209. 1833. Basionym. Panicum colonum L., Syst. Nat. (ed. 10) 2: 870. 1759. Type . LINN-80.23 ( lectotype , designated by Hitchcock 1908 ). Image available at http://linnean-online.org/1255/. Remarks. Echinochloa colona is usually easy to identify, yet care should be taken to distinguish it from forms with small spikelets of E. crus-galli ( Martinez-Azorin and Crespo 2021 ). In the Mediterranean region, it occurs as a persistent weed in crop fields; elsewhere, it has only been recorded as a usually ephemeral alien.