Avena is not a valid species

Did you mean one of the species from the following list?

Anisopogon avenaceus - 5 collection objects

Avena barbata - 6 collection objects

Avena byzantina - 1 collection objects

Avena fatua - 7 collection objects

Avena sativa - 7 collection objects

Avena sterilis - 5 collection objects

Enneapogon avenaceus - 1 collection objects