As Craig recognized, our mystery seeds from last week were from a camelina plant, Camelina sativa.
(Public domain illustration by Carl Axel Magnus Lindman)
It has small yellow flowers like other members of the mustard family. The yellow flowers give it another common name: "gold-of-pleasure."
Camelina has been receiving some interest from researchers lately as a potential source of biodiesel and also as a source of oils human consumption. We are likely to be seeing more of it grown in the future.
Does camelina grow where you live?