A new variety of Gentiana L. plant (Japanese gentian) which has a color of inner side of lobes which is strong purplish blue (96C on RHS Colour Chart) and a time of flowering in mid-October.

A new variety of Gentiana L. plant (Japanese gentian) which is a double flower type and has a diameter at the top of the corolla of 30.6 mm.

A new variety of Gentiana L. plant (Japanese gentian) which is a double flower type and has about 3 (2.9 on average) side shoots with only one node.

A new variety of Gentiana L. plant (Japanese gentian) which is a double flower type and has about 1-2 (1.5 on average) side shoots with only one node.

A new variety of Gentiana L. plant (Japanese gentian) which is a double flower type and has about 1-2 (1.5 on average) side shoots with only one node.

A new variety of Gentiana L. plant (Japanese gentian) which has a color of inner side of lobes which is light purple (N80D on The R.H.S. Colour Chart) and a stem length of 77.9 cm on average.

A new variety of Gentiana L. plant (Japanese gentian) which has a color of inner side of lobes which is light purple (N80D on The R.H.S. Colour Chart) and a stem length of 77.9 cm on average.

A new variety of Gentiana L. plant (Japanese gentian) which has a narrow lanceolate leaf shape and a stem length of 71.0 cm on average.

A new variety of Gentiana L. plant (Japanese gentian) which has a narrow lanceolate leaf shape and a stem length of 71.0 cm on average.

Provided relates to a crop Lisianthus (Eustoma grandiflorum) plants that do not require cold treatment (vernalization) for the inductions of bolting and flowering, and to means and methods for producing same.