Hi Dick -- Roses aren't grown from seed in quite the way tomatoes are.

You can't buy seed of a hybrid rose, and know what it will be when it grows up.
Your best bet would be seed from species roses.
The link below offers seeds of Rosa glauca.

Jeri

Here is a link that might be useful: Has R. glauca seeds

Does it have to be seeds, or can you give her bareroot roses? There are many available roses to grow that are easy if she doesn't mind not growing from seeds. Roses are usually either potted plants, ownroot roses, bare root roses, or cuttings. Some more experienced rosarians on here can tell you where to find them.

Can she plant them in spring? The best I think, are own root roses, and there are many places to buy those. Heirloom roses, Paul Zimmerman roses, are two good online sources.

There are several species roses you can grow from seed,

You can wintersow Rosa Rugosas if you wish, but it will be years before they are tall enough to put up a good bloom. Others have done R glauca or whatever that one is, the pretty dainty rose with the dark hips. However any hybrids you grow will not be the same as thier parents and alot of them would be dogs.

I wouldnt really bother for the project you are talking about , a half dozen truly hardy roses that can take abuse sounds just about right, I would add a smattering of rugosas around.

If you want us to post a list let us know.

Thanks

Silverkelt

Seeds from modern roses contain DNA from every rose used to hybridize that rose. They also contain DNA from every rose in the parentage all the way back to the original plant. It's sort of like humans. We have DNA from every ancestor we have. There is no way we can predict who our offspring will look like. Same with roses or any other hybridized plants. The only way to produce a bush true to it's parent is to root cuttings or graft a bud onto a viable root stock. That bud will grow true but should it die the root stock can take over.
A species rose is one that grows true to the variety from seed. These were the original roses from which all we have today are hybridized from. While there are many species roses, many won't grow in a cold winter climate like Michigan.
Modern hybridizers plant thousands of seeds to get just one or two roses that might be worth keeping.
They're looking for roses that they can market so they are very choosy.
For what your son's girlfriend want to do, a seed that grows and produces a flower could be a success.
I Googled "Growing roses from seeds."
The following link has a number of sites that give instructions on how to do that.
As stated above, it's not as simple as planting tomatoe seeds in a flat and it takes considerably longer.

Here is a link that might be useful: Google links on growing roses from seeds

I'm pretty sure your son's girlfriend thinks she wants to grow roses from seed because she doesn't know the facts that our experts here have just explained. Also, as was mentioned, it would take a long time for seedlings to grow into decent sized plants.

There is a Greater Lansing Rose Society, whose members would be happy to give advice appropriate to local conditions. The ARS website lists contact information at:

http://www.ars.org/?page_id=8#mi

Scroll down to the listings for Michigan and you will see how to contact their president. That should be able to recommend good local sources for rose varieties that do well there, or seeds if that's what she really wants.

I used to germinate these rose seeds and our local rose society sold them in the spring as a fund raiser. They germinate readily, and we have never had a complaint about them. Each plant is different. I have kept a number of them for my own garden. One is just outside our kitchen window. It is there because it is high enough to be seen but not too high to block the view. It flowers all summer. It is not sprayed nor pruned. It does not suffer any winter damage but remember it is in a sheltered position. I am in zone 5 northeast Ohio.

http://www.parkseed.com/gardening/PD/51644

Here is a link that might be useful: link for above