What are the treatments if any for this? Does anyone know if it carries over into saved seed? I have a single plant of Nigra (black) that I have been saving seed of this stock since 2006 first few years no rust then I didn't plant any for about 3 years found some old seed and planted it not many came up this one plant is double stalked and loaded with blooms I hope to save the seed but if the rust carries over then I will not. Plant is over all healthy except the leaves nearly bare now what few leaves are left are covered with this rust.
Any replies welcomed

You need to spray for rust as soon as the plants emerge. At least, that's what I found when researching the problem with my own hollyhocks. I believe it's environmental, not carried in the seeds. I could be wrong, tho.

That's right - rust is a fungal disease, not transmitted genetically (i.e. by seed).

Alcea ficifolia is said to be resistant to rust - can't say, personally.

I had to stop growing Hollyhocks because of rust at my current house. Never had any problems at my old house.

A nice friend just gave me five seedlings. I need to find them another home. I'm not going to even try again at this place.