clogweed

The reference to pigs (like the alternatives of "cow-cakes" in Somerset or "cow clogweed" in Scotland) drew on the fact that it was gathered as fodder for livestock.

Country diary 2010

Parsley and "gix," and clogweed, and sauce-alone, whose white flowers smell of garlic if crushed in the fingers, came up along the hedge; by the gateway from the bare trodden earth appeared the shepherd's purse; small must be the coin to go in its seed capsule, and therefore it was so called with grim and truthful humour, for the shepherd, hard as is his work, facing wind and weather, carries home but little money.

Nature Near London Richard Jefferies 1867