The present invention provides a breeding method for tetraploid ricinus communis. The method comprises: collecting a ricinus communis germplasm resource, performing morphologic character analysis and chromosome ploidy identification, selecting good diploid varieties, carrying out mutagenesis by using colchicine and oryzalin; performing chromosome ploidy identification on F1 generation seeds, selecting homozygous tetraploids, and performing economic character analysis and identification on the F2 generation, so as to breed good tetraploid ricinus communis.

A new poinsettia plant particularly distinguished by having broad marbled cream and dark pink bracts, a triangular plant form, an upright growth habit, and excellent keeping quality, is disclosed.

A new and distinct cultivar of Euphorbia plant named Bonpr 974BK, characterized by its upright and mounded plant habit; moderately vigorous growth habit; freely branching habit; large inflorescences with white-colored flower bracts; and good post-production longevity.

A new and distinct cultivar of Poinsettia plant named Rockefeller Red, characterized by its upright to slightly outwardly and uniformly mounded plant habit; moderately vigorous to vigorous growth habit; freely and upright to slightly outwardly branching habit; strong and narrowly upright v-shape branching habit; dark green-colored leaves; upright to horizontal flower bracts that are bright red in color; prominent, large and dense cyathia clusters; and good post-production longevity.

A new and distinct cultivar of Poinsettia plant named Rockefeller Red, characterized by its upright to slightly outwardly and uniformly mounded plant habit; moderately vigorous to vigorous growth habit; freely and upright to slightly outwardly branching habit; strong and narrowly upright v-shape branching habit; dark green-colored leaves; upright to horizontal flower bracts that are bright red in color; prominent, large and dense cyathia clusters; and good post-production longevity.

A new and distinct cultivar of Euphorbia plant named Bonpoiakani, characterized by its upright and mounded plant habit; moderately vigorous growth habit; freely branching habit; inflorescences with large intense red-colored flower bracts that resist damage during transportation; relative low temperature tolerance during production; and good post-production longevity.

A new poinsettia plant particularly distinguished by having broad marbled cream and dark pink bracts, a triangular plant form, an upright growth habit, and excellent keeping quality, is disclosed.

A new and distinct cultivar of Poinsettia plant named Rockette Dark Red, characterized by its upright to slightly outwardly and uniformly mounded plant habit; moderately vigorous to vigorous growth habit; freely and upright to slightly outwardly branching habit; strong lateral branches; strong and narrowly upright v-shape branching habit; dark green-colored leaves; numerous upright flower bracts that are deep red in color; prominent, large and dense cyathia clusters; and good post-production longevity.

A new and distinct cultivar of Poinsettia plant named Rockette Dark Red, characterized by its upright to slightly outwardly and uniformly mounded plant habit; moderately vigorous to vigorous growth habit; freely and upright to slightly outwardly branching habit; strong lateral branches; strong and narrowly upright v-shape branching habit; dark green-colored leaves; numerous upright flower bracts that are deep red in color; prominent, large and dense cyathia clusters; and good post-production longevity.

A determinate castor is provided. Also provided are methods of generating and using same as well as products thereof.