Helianthus nuttallii subsp. rydbergii (Britton) R.W.Long Brittonia 18: 77 (1966)

Nomenclatural References

• literature : Long, R. W. (1966). Biosystematics of the Helianthus nuttallii Complex (Compositae). Brittonia, 18(1), 64. https://doi.org/10.2307/2805111 DOI link imported from Page, R. (2023). doi:10.5281/zenodo.7974720
• person : Nathaniel Lord Britton (1859-1934) Based on occurrence of standard abbreviation 'Britton' in the authors string.
• person : Robert William Long (1927-1976) Based on occurrence of standard abbreviation 'R.W.Long' in the authors string.
• database : IPNI record: 119197-2
• database : The Plant List v1.1 record gcc-39190
• database : The Plant List version 1.0, record: gcc-39190