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CCDB → Angiosperms → Plantaginaceae → Penstemon → Penstemon tubiflorus Nutt.

2 chromosome counts in Penstemon tubiflorus Nutt.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
!		Penstemon tubiflorus	Penstemon tubiflorus Nutt.	16		IPCN online	Freeman, C. C. & R. E. Brooks. 1988. Documented plant chromosome numbers 1988: 1. Chromosome counts for North American plants -- I. Sida 13: 241–250.
!		Penstemon tubiflorus	Penstemon tubiflorus Nutt.	16		IPCN online	Freeman, C. C. 1983. Chromosome numbers in Great Plains species of Penstemon (Scrophulariaceae). Brittonia 35(3): 232–238.