I see these all over the place but you can't buy them that I know of. Some have finally migrated to my property but not where I want them, still I feel blessed. I don't know this lily's name and would like to know its botanical name. I feel stupid, like I should know. I would like to know if I can grow them from seed.

hemerocallis fulva. Also called Ditch Lily. It is a species daylily, and is very easy to grow. The roots spread and help prevent erosion, which is why it is used so much in ditches and on steep banks. Rather than growing by seed, just divide the roots on this one to make more.
You don't see it in stores because people share this one freely, and there are so many newer hybrids out there that have a longer bloom time and prettier faces.
I love seeing this one out in the country, untended by humans, just cheerfully blooming its head off, year after year!

CindiKS is right, divide by the roots if you want more of them. But be careful, it will spread! Some of the older "species" varieties are not fertile, so they won't make seeds, but many of the newer varieties can be cross pollinated to make seeds. If you are interested in getting more of them, or want to learn more, check out the Daylily Forum on here, or go to daylilies.org . The newer daylily hybrids are more "tame" and won't take over like these. Fun fact, these are not part of the true lily family, they are hemerocallis, which means "beauty for a day", each bloom only lasts 1 day. Happy Gardening!

Thank you so much for answering my question. I didn't grow up in the country to learn these things as a kid. I am learning so much now and am fascinated by how much beauty and value are in those ditches.

Here's more information for Ditch Lily (Hemerocallis fulva)

Thank you plantladyin. I have seeds from the flowers I picked up from the side of the road that were cut by our town mowers. I want to find out if I can plant them and when. I appreciate the link.

If I want to reply specifically to someone in a post how do I do that?

Hi Lioba! You can tag any member like this @Lioba for example. Just use @ and then add their screen name.

Lioba said:Thank you plantladyin. I have seeds from the flowers I picked up from the side of the road that were cut by our town mowers. I want to find out if I can plant them and when. I appreciate the link.

If I want to reply specifically to someone in a post how do I do that?

Also if you want to send a message privately you can send a Tree-Mail, just click on the person's ID and it will give you that option.

It's unusual for the "ditch lily" Hemerocallis fulva 'Europa' to set seeds. Are the seeds you found fairly large and black?

@sooby
The seeds are not large and black. I took another look. They are immature flowers. However, I have a few along the creek that I didn't plant. How would they get there if no other have been around for years. I prayed for them! But really?

If it's the ditch lily they typically spread by bits of the plants getting broken off and transported somewhere else, such as by machinery, or floating along the creek. With the ditch lily you will probably find that any seed pods that do form do not have viable seeds. If you find some pods with seeds that are large and black then you can certainly try to germinate them but you're more likely to have success propagating them by digging some up and dividing them. They do spread though so you'll have more soon whether you plan to or not The problem with the ditch lily is that it has an odd number of chromosomes so usually does not set viable seeds, although it can occasionally.

Ditch lilies have situated themselves all around our creek since we moved here 8 years ago. I think it is because animals love to eat the daylilies, and it is real possible a raccoon or deer has pulled out a plant and dropped it in another spot. We've had a few floods that unearthed plants, so it is likely that water moved some downstream. I know my water iris moved that way!