Kaliwatan sa tanom nga bulak ang Polycarpaea gayi.^[1] Una ning gihulagway ni Philip Barker Webb.^[2] Ang Polycarpaea gayi sakop sa kahenera nga Polycarpaea, ug kabanay nga Caryophyllaceae.^[1][3]

Kini nga matang hayop na sabwag sa:

• Cabo Verde

Ang kaliwatan gibahinbahin ngadto sa matang nga nahiubos:^[1]

• P. g. halimoides
• P. g. lycioides

1. ↑ ^{1.0 1.1 1.2} Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2019). "Species 2000 & ITIS Catalogue of Life: 2019 Annual Checklist". Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X. TaxonID: 53546978. Retrieved 2019-11-11. {{cite web}}: |author= has generic name (help)CS1 maint: multiple names: authors list (link)
2. ↑ Webb (1849) , In: Hook. Niger. Fl. 104
3. ↑ Hassler M. (2019). World Plants: Synonymic Checklists of the Vascular Plants of the World (version Nov 2018). In: Species 2000 & ITIS Catalogue of Life, 2019 Annual Checklist (Roskov Y., Ower G., Orrell T., Nicolson D., Bailly N., Kirk P.M., Bourgoin T., DeWalt R.E., Decock W., Nieukerken E. van, Zarucchi J., Penev L., eds.). Digital resource at www.catalogueoflife.org/annual-checklist/2019. Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-884X.