Penstemon confertus var. caeruleo-purpureus A.Gray Proc. Amer. Acad. Arts 6: 72 (1862)

Nomenclatural References

• literature : Proc. Amer. Acad. Arts 6: 72. 1862 as Pentstemon BHL link from IPNI metadata.
• person : Asa Gray (1810-1888) Based on occurrence of standard abbreviation 'A.Gray' in the authors string.
• database : IPNI record: 187290-2