Bulnesia

{{Short description|Genus of flowering plants}}

{{Automatic taxobox

|image = Bulnesia-retama-20080330.JPG

|image_caption = Flowering branches of B. retama

|taxon = Bulnesia

|authority = Gay{{cite web |url=http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?1789 |title=Bulnesia Gay |work=Germplasm Resources Information Network |publisher=United States Department of Agriculture |date=2004-06-18 |access-date=2009-09-27 |archive-url=https://web.archive.org/web/20110606010116/http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?1789 |archive-date=2011-06-06 |url-status=dead }}

|subdivision_ranks = Species

|subdivision = See text

}}

Bulnesia is a genus of flowering plants in the caltrop family, Zygophyllaceae. Species in this genus are all native to South America.{{Cite web |title=Bulnesia Gay {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:41705-1 |access-date=2025-05-06 |website=Plants of the World Online |language=en}} The wood of some – particularly B. arborea and B. sarmientoi – is traded as verawood (colloquially "vera") or "lignum vitae". They are close relatives of the "true" lignum vitae trees of genus Guaiacum.