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CCDB → Angiosperms → Compositae → Hieracium → Hieracium gracile Hook.

7 chromosome counts in Hieracium gracile Hook.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
!		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.		18	Hieracium	Kruckeberg 1967; Pojar 1973; Guppy 1978
!		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.		19	Hieracium	Guppy 1978
		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.		18	IPCN online	GUPPY, G. A. 1978. Species relationships of Hieracium (Asteraceae) in British Columbia. Canad. J. Bot. 56: 3008–3019.
		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.		19	IPCN online	GUPPY, G. A. 1978. Species relationships of Hieracium (Asteraceae) in British Columbia. Canad. J. Bot. 56: 3008–3019.
		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.	9		IPCN67-71	KRUCKEBERG, A. R. 1967. A hybrid hawkweed from the Olympic Mountains of Washington. Madrano 19: 126-129.
		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.	9		IPCN73-74	POJAR, J. 1973. Levels of polyploidy in four vegetation types of southwestern British Columbia. Canad. J. Bot. 51: 621-628. I
		Hieracium gracile Hook.	Hieracium triste Willd. ex Spreng.		18	Fedorov, 1974	Stebbins et al. 1953