Ilex paraguaiensis, a species of holly native to southern South America; or the dried leaves and twigs of this plant(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "yerba" in a sentence
"A native of western North America, S. douglasii, is known as yerba buena in California, and has a mild, mint-like flavor."
"The traditional South American beverage called yerba mate is still relatively unknown in the US."
"The report of his prosperity had reached the ears of Francia, Paraguay's then despot and dictator, who, with other strange theories of government, held the doctrine that the cultivation of "yerba" was a right exclusively"