"CEDAR FALLS, Iowa — Bounding out of a silver Ford pickup into the single-digit wind-flogged flatness that is Iowa in December, Laura Jackson strode to a thicket of desiccated sticks and plucked a paisley-shaped prize."
"It was a pod that, after a gentle squeeze, burst with chocolate brown buttons: seeds of milkweed, the favored — indeed, the only — food of the monarch butterfly caterpillar.
Once wild and common, milkweed has diminished as cropland expansion has drastically cut grasslands and conservation lands. Diminished too is the iconic monarch."