Penstemon glaber var. stenosepalus Regel Gartenflora 24: 34 (1875)

Nomenclatural References

• literature : Gartenflora 24: 34, tab. 821. 1875 BHL link from IPNI metadata.
• person : Eduard August von Regel (1815-1892) Based on occurrence of standard abbreviation 'Regel' in the authors string.
• database : IPNI record: 187430-2