Eustoma is a genus in the family Gentianaceae.
I'm a little confuse, about how many species comprise this genus.
Wikipedia mention three species, but don't enumerate the species.
http://en.wikipedia.org/wiki/E...
Here:
http://gentian.rutgers.edu/gen...
say only two accepted specie: Eustoma exaltatum and Eustoma grandiflorum.
The name of Eustoma grandiflorum was change in Eustoma russellianum.
On other sources
http://www.wildflower.org/plan...
it is mention only Eustoma exaltatum with two subspecies. Eustoma exaltatum ssp.exaltatum and Eustoma exaltatum ssp.russelianum.
I think that is the last redefinition of the genus.
The plants are native in US.
Eustoma exaltatum
