Lunaria annua.

Botanical name: 

Lunaria annua Linn. Cruciferae. Bolbonac. Honesty. Penny Flower.

Europe. "The seed of the bolbonac is a temperature hot and dry and sharpe of taste and is like in taste and force to the seed of treacle mustard, the roots likewise are somewhat of a biting quality but not much: they are eaten with sallads as certain other roots are." (Gerarde, J. Herb. 465. 1633.)

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.