Penstemon alpinus f. riparius (A.Nelson) Pennell Contr. U.S. Natl. Herb. 20: 349 (1920)

Nomenclatural References

• literature : Contr. U.S. Natl. Herb. 20: 349. 1920 BHL link from IPNI metadata.
• person : Aven Nelson (1859-1952) Based on occurrence of standard abbreviation 'A.Nelson' in the authors string.
• person : Francis W. Pennell (1886-1952) Based on occurrence of standard abbreviation 'Pennell' in the authors string.
• database : IPNI record: 187135-2
• database : The Plant List v1.1 record tro-50079833
• database : The Plant List version 1.0, record: tro-50079833