Eight taxa of Achnanthes Bory from samples collected in 21 freshwater
bodies of Cuba, are characterized and illustrated. A. exigua var. cons
tricta Hustedt, A. lanceolata subsp. dubia Grunow, A. lanceolata subsp
. rostrata (Oestr.) Lange-Bertalot and A. lanceolata subsp. frecuentis
sima Lange-Bertalot var. magna (Straub) Lange-Bertalot are reported fo
r the first time from Cuba. Four other taxa, A. exigua Grunow, A. lanc
eolata (Breb.) Grunow var. lanceolata, A. inflata (Kutz.) Grunow and A
. brevipes var. intermedia (Kutz.) Cleve, are recorded from new locali
ties of the island.