Gentiana is a large genus of Gentianaceae including about 400 species, which are widely distributed in the temperate regions of the world alpine zone, most of them are annual or perennial herbaceous plants, some are evergreen. Most of these species have blue trumpet- shaped flowers. China has more than 230 species and main of these grow in alpine scree, alpine meadow and shrub of Southwest China.     1.Gentiana veitchiorum     2.Gentiana rubicunda     3.Gentiana trichotoma     4.Gentiana algida     5.Gentiana nubigena