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CCDB → Angiosperms → Compositae → Senecio → Senecio riddellii Torr. & A. Gray

4 chromosome counts in Senecio riddellii Torr. & A. Gray:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Senecio riddellii Torr. & A. Gray	Senecio riddellii Torr. & A. Gray	20(1)		Asteracea	Ward 1984 Phytologia
		Senecio riddellii Torr. & A. Gray	Senecio riddellii Torr. & A. Gray	20		IPCN online	Ward, D. E. 1984. Chromosome counts from New Mexico and Mexico. Phytologia 56(1): 55–60.
!		Senecio riddellii Torr. & A. Gray	Senecio riddellii Torr. & A. Gray	20		IPCN73-74	TURNER, B.L;, A.M. POWELL, & T.J. WATSON, JR. 1973. Chromosome numbers in Asteraceae. Amer. J. Bot. 60: 592-596.
!		Senecio riddellii Torr. & A. Gray	Senecio riddellii Torr. & A. Gray		40	eFlora