Penstemon cinereus Piper Contr. U.S. Natl. Herb. 16: 209 (1913)

Nomenclatural References

• literature : Contr. U.S. Natl. Herb. 16: 209. 1913 BHL link from IPNI metadata.
• person : Charles Piper (1867-1926) Based on occurrence of standard abbreviation 'Piper' in the authors string.
• database : IPNI record: 187264-2
• database : The Plant List version 1.0, record: tro-29203922
• database : The Plant List version 1.1, record: tro-29203922