Eustoma Gradiflorum is Gentianaceae biennial herbs, be produced in central region in America at first, Japan educated this kind of plant first in 1935, Eustoma Gradiflorum did not develop quickly until be close to 20 years.

• 草原龙胆(Eustoma Gradiflorum)属龙胆科一、二年生草本植物,原产于美洲中部地区,直到近20年草原龙胆才迅速发展起来。