Avena barbata is a species of wild oat known by the common name
slender wild oat. It has edible seeds. It is a diploidized autotetraploid grass (2n=4x=28). Its diploid ancestors are
A. hirtula Lag. and
A. wiestii Steud (2n=2x=14), which are considered Mediterranean and desert ecotypes, respectively, comprising a single species.
A wiestii and
A. hirtula are widespread in the Mediterranean Basin, growing in mixed stands with
A. barbata, though
(Wikipedia)