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CCDB → Pteridophytes → Cystopteridaceae → Cystopteris → Cystopteris douglasii Hook.

2 chromosome counts in Cystopteris douglasii Hook.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
!		Cystopteris douglasii Hook.	Cystopteris douglasii Hook.		c.336	Love, 1977	Blasdell 1963
		Cystopteris douglasii Hook.	Cystopteris douglasii Hook.	c. 168		Cave1963	Blasdell 1963