Tests and dips are equally edible. The yellows remind me of iceberg lettuce, with flowery hints.
The ancestors of tetraploid daylilies have been exposed to colchicine or some other chemical in order to induce polyploidy, but this is inconsequential as the chemical is not only transitory, but would essentially be lost through dilution in the first generation. You might not want to consume the flower segments on the first scape of a newly-treated plant, but in reality, that's probably not a problem either. I believe colchicine is transitory, based on the reasoning that it interrupts cell division, and if it was that persistent in the treated plant, it wouldn't survive.
Regarding the seedlings from that plant, and subsequent tetraploid generations, consider how much of any contaminant could be transferred to a seed, and how diluted that chemical would be once that tiny bit of tissue grew into a blooming size plant.
What I would be more concerned with is what fungicides and pesticides your plants have been exposed to. Some of them can persist in plant tissues for up to six months or longer - long enough for someone else to have sprayed (or dipped) a daylily and shipped it to you to bloom that season. Spraying for rust seems to be routine in many daylily gardens, and the most common—and effective—chemicals are systemic. Dip-and-ship is common as well.
I seem to remember reading a scientific paper regarding naturally-occurring substances in hemerocallis plants which might be an issue if ingested in large quantities, but I can't recall where I found that information. I'm pretty sure this is the case with most plants, so munch away.
Ken
