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Three new species of Koanophyllon are added to the Mexican Flora: K. coixtlahuacum B.L. Turner, from Oaxaca; K. concordianum B.L. Turner, from Sinaloa; and K revealii, from Guerrero and Oaxaca. In addition, a new varietal combination is proposed: K. solidaginoides: var. filicaulis (Sch.-Bip. ex A. Gray) B.L. Turner, a widespread taxon in eastern Mexico. Distribution maps are provided, along with photoholotypes. The several taxa are keyed along with yet other Mexican taxa in the format ofdoi:10.5962/bhl.part.20625 fatcat:vwlgoo3blfgu7pudkjc3iuwl4a