“A weed is a plant considered undesirable in a particular situation, ‘a plant in the wrong place’. Examples commonly are plants unwanted in human-controlled settings, such as farm fields, gardens, lawns, and parks.” (Wikipedia)
Pennycress, in the Family Brassicaceae, is a pervasive pesky little mustard-family spring “weed” that as it turns out has great potential as a source of energy <http://www.metroagservices.com/masfmm/>,
and is edible – please research the edible claim for yourself.
According to Wikipedia field pennycress has a distinctive bitter taste and is usually parboiled to remove the flavor in salads. Here is a Recipe for Pennycress Honey Mustard.
Marty is using the naturally occurring pennycress to lure hungry harlequin bugs to their own salad bar in the Niles Home Garden. He created two beds by hoeing circles around existing pennycress and uprooted the other pennycress throughout the garden. Interns then planted sacrificial mustard greens and broccoli to satisfy the hungry bugs.