Correspondence Orchid
Dendrobium epistolare
An orchid whose petals carry faint handwriting — always a letter of thanks, never to anyone the gardener knows.
Cartographer's Root
Daucus itinerans
A wild carrot whose taproot grows in the exact shape of the route to wherever its seed was collected.
Honest-Signal Saw-Sedge
Cladium mariscus
A stand of saw-sedge in the Brière left lapwings unable to fake a broken wing and a guest's setter unable to play, until a hotel paved it over.