The name Anacardium, originally from the Greek, actually refers to the nut, core or heart of the fruit, which is outwardly located (ana means "upwards" and -cardium means "heart").
Taxonomy
The oldest species of the genus Anacardium is Anacardium germanicum from the Eocene aged Messel Pit of Germany, well outside the current range of the genus.[2] They were present in the Americas by the Oligocene-Miocene, as evidenced by the species Anacardium gassonii from Panama.[3]
As of July 2020[update], the PoWO (Plants of the World Online) accepts 13 species:[4]
Anacardium giganteum (Bertero & Balb. ex Kunth) Skeels
Anacardium humile Hance ex Engl.
Anacardium microsepalum Loes.
Anacardium nanum A.St.-Hil.
Anacardium occidentale L.
Anacardium parvifolium Ducke
References
^"Anacardium L."Germplasm Resources Information Network. United States Department of Agriculture. 2009-11-23. Archived from the original on 2009-05-06. Retrieved 2010-02-10.