is native to Mexico
and the southern U.S. (Texas
) and is closely related to Acacia berlandieri
. Common names for it are Black Brush
and Chaparro Prieto.
It is a perennial tree which is not listed as being threatened. It grows 1.5-4.6m tall.
Chemical compounds found in Acacia rigidula
These findings have never been confirmed or discussed and are considered by some to be unlikely and a product of contamination or a hoax. Some of the apparently found phenylethylamines were previously only known as man made and their discovery would have been quite revolutionary. Also the authors of the 1998 study did not answer written requests.