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CCDB → Angiosperms → Compositae → Helianthus → Helianthus × laetiflorus Pers.

2 chromosome counts in Helianthus × laetiflorus Pers.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
!		Helianthus × laetiflorus None	Helianthus × laetiflorus Pers.	51		Cave1956supp	Heiser & Smith 1955
!		Helianthus × laetiflorus None	Helianthus × laetiflorus Pers.	51		Cave1963	Clev. & Heiser 1963