Helianthus debilis subsp. cucumerifolius explained

Helianthus debilis subsp. cucumerifolius, or cucumberleaf dune sunflower, is a subspecies of the species Helianthus debilis in the genus Helianthus, family Asteraceae.^{[1] [2]} It is native to the South Central regions of the United States and exists naturalized in every continent except Antarctica.^[3]

Notes and References

1. Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, editors. 2012. "The Jepson Manual: vascular plants of California", second edition. University of California press, Berkeley. . pp 344
2. Web site: Helianthus debilis subsp. Cucumerifolius - Species Details.
3. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250068432 Helianthus debilis ssp. cucumerifolius.