a given plant can not change its genetics and change ..

but if you let them seed.. the degradation of the genetics .. of the seed might lead them all back toward a common color.. perhaps orange.. as good old mom suggests ...

the usual process is to let plants bloom.. mark them accordingly.. and dig them out after bloom ... predictably IDing a giant overgrown clump into different plants..including hundreds of rogue seedlings from said plants.. might be possible.. but probably not probable ...

ken

Can you tell? Yes and no. Some hybrids do have leaves that are a bit different- a bit narrower or bigger, darker, frilly or twisting, ect. So I can tell those from Fulvas. But there are also a LOT of hybrids that have leaves pretty much the same as Fulvas and those I can't tell apart unless they are blooming. In my yard Fulvas can pop up a week or two earlier and be a bit bigger than some of the other lilly foliage, but that isn't always a good indicator in everyones yard.

If there are Fulvas and hybrids together. Fulvas tend to naturalize much faster, thus popular for ditch plantings for ages. Hybrids tend to be slower than Fulvas. So it's easier for Fulvas to overtake the hybrids and choke them out. Both with tuberous rhizomes spread and seed drop. It appears as a reversion or something odd with the hybrids. Hybrid tuberous rhizomes won't change gentics- their seed drop can be less reliable and viable, but they won't really revert to Fulvas completely.

If you have hybrid in Fulvas. You can deadhead the Fulvas as they bud up. Leave the stalks to help mark them. When the hybrid blooms, use a marker to mark that one. As soon as it's done blooming and safe to start moving, remove it from the Fulvas. Give zero craps about how much you damage or distrub the Fulvas in the process, they will be fine. Probably appreciate being rucked up. Take your hybrid and put it somewhere safe to grow out a bit- a pot, new garden spot, ect. Be prepared to weed out Fulvas from that spot, no matter how careful you think you cleaned that hybrid up before replanting.

Yes, the species daylilies will crowd out the hybrids. The clumps not only increase quickly but the roots send out shoots. That is part of the reason it is near impossible to get rid of them. They can come up far from the clump. I've been fighting with species in my front bed since I moved to this house in the late 90's. I've dug what I thought was everyone of them up and still one or two reappear almost every year. No, I've never seen any cross with them. Some of the species varieties are are actually triploids and infertile therefore cannot cross. I've never seen a species set pods and I grew up in a yard full of about 3 or 4 types of them.

As to what colors you'd get if they ever crossed with a hybrid, it would depend on what color the hybrid is. There is a chart floating around on the internet by Bob Carr [hard to find] that shows the various colors crossed and the most likely color results. I printed out one and it seems to be fairly accurate. I also saved it to computer as several jpgs. Buff [tan and brown] seems most dominant, purple and lavender are next, then peach [apricot and copper]. Red, pink and melon are not dominant at all. There is no white on the list, however, possibly because white is usually an extremely pale color.