Monocotyledons in Romania are known to have uses in 439 species classified in 25 families. These account for 929 recorded uses, of which 723 economy and 206 ecology. In addition, there are only 24 species with a relatively low degree of toxicity. In the lists mentioned in the paperwork, there are 32 rare species, 2 glacial relics, 18 vulnerable and 55 with disturbances in their area but not classified in a protection category; that’s why we have called them threatened. This article cites 125 species that have 221 uses in the economy and another 38 uses in ecology and environmental protection.