Eustoma, commonly known as lisianthus is a small genus of plants in the gentian family, with currently three known species. The lisianthus originates from North America where it grows in desert riverbeds and in prairie regions.

They are also native to warm regions of the southern United States, Mexico, Caribbean.

Lisianthus is officially called Eustoma (derived from the Latin name Eustoma russellianum Grandiflorum). The name Lisianthus is made up of two Greek words; Lysis, translating as dissolution and Anthos, translating as flower).