All the moments Chuck can't forget, whether he wants to or not, are marked and catalogued in his head by flowers. When his mind's eye flashes on those flowers, their images trigger real memories, not files on terrorists or nuclear launch codes. He can't decide if that's a good thing or a bad thing, but he supposes there are worse things to remember his life by.
Besides, he kind of likes what plants symbolize. On the day a plant dies, you can take the seed, bury it in the ground, and wait for it to grow into something new. A new beginning with endless opportunities.
And that suits Chuck just fine.
finis