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

11 chromosome counts in Aphanostephus riddellii Torr. & A. Gray:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray	5(1)		Asteracea	Watson 1973 Southw. Naturalist
!		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray		10(1)	Asteracea	Zhao 1996 Sida (= J. Bot. Res. Inst. Texas)
		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray	5		IPCN online	Powell, A. M. & S. A. Powell. 1978. Chromosome Numbers in Asteraceae. Madroño 25(3): 160–169.
		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray		10	IPCN online	Zhao, Z. & B. L. Turner. 1993. Documented chromosome numbers 1993: 3. Miscellaneous U.S.A. and Mexican species, mostly Asteraceae. Sida 15: 649–653.
		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray		10	IPCN online	Zhao, Z. 1996. Documented chromosome numbers 1996:2. Miscellaneous U. S. A. and Mexican species, mostly Asteraceae. Sida 17(1): 259–263.
		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray	5		IPCN online	Turner, B. L. 1978. In IOPB chromosome number reports LXII. Taxon 27: 519–535.
!		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray	5		IPCN67-71	SOLBRIG, Q.T., L.C. ANDERSON, D.W. KYHOS, & P.H. RAVEN. 1969. Chromosome numbers in Compositae. VIII: Astereae III. Amer. J. Bot. 56: 348-353.
!		Aphanostephus riddellii Torr. & Gray	Aphanostephus riddellii Torr. & A. Gray	5		IPCN73-74	WATSON, T.J., Jr. 1973. Chromosome numbers in Compositae from the southwestern United states. Southw. Naturalist 18: 117-124.
!		Aphanostephus riddellii Torr. & A. Gray	Aphanostephus riddellii Torr. & A. Gray		10,20	eFlora
!		Aphanostephus riddellii T. E. A. Gray	Aphanostephus riddellii Torr. & A. Gray		10	Fedorov, 1974	Turner, Crammer 1964
!		Aphanostephus riddellii T. E. A. Gray	Aphanostephus riddellii Torr. & A. Gray		10	Fedorov, 1974	Turner, Mabry 1964