Complex sentence: In 1972, Demoulin described the species "Lycoperdon americanum" on the basis of a specimen found in North Carolina; although he believed it to a unique species, several authors consider it synonymous with "L. echinatum".
Split into simpler sentences: In 1972, Demoulin described the species "Lycoperdon americanum" on the basis of a specimen found in North Carolina. Although he believed it to a unique species, several authors consider it synonymous with "L. echinatum".