17–18 – see text Krameria is the only genus in the Krameriaceae family, of which any of the approximately 18 species[3] are commonly known as rhatany, ratany or rattany.

Krameria are found across the Americas where they grow in habitats ranging from arid deserts to subtropical savannas.

[6] Krameria was first collected by european botanists in the 1750s during an expedition in northern South America by Pehr Löfling.

This divergence, exemplified by root parasitism and specialized pollination structures, is driven by coevolutionary relationships with insects and other plants.

Previously allied with the Polygalaceae and the Fabaceae, genetic analyses[10] in 1993 and 2000 showed that Krameriaceae is most closely related to Zygophyllaceae.