There are some interesting varieties offered in the seed catalogues.
T&T Seeds has Pink Blush 16" , Silver Cup 2', Novella (bright rose)14"
Stokes Seeds has Mont Blanc (White) 24", Silver Cup & Novella
Veseys Seeds has the Regris Series (White,Pink, Ruby & Mix) 2 - 3'
William Dam Seeds has Silver Cup, Mont Blanc and Beauty Mix 24"
McFayden has Twins Hot Pink 12-20"
Dominion Seed has Twins Hot Pink, Cool White 12-20", Beauty Mix & Silver Cup

The shorter ones are great in large containers

Hmmm...the only ones new to me are Novella and Pink Blush. I've planted all the others in the past...Thanks!

Maritima and Barnsley are two I like to grow, too, but harder to find seeds for them.

isn't there an orange malva of some kind? i can't find it now but have seen it in the past. any help?

I wish I knew what variety Hirts Nursery really sent me. I have huge amounts of seed (F2 seed if my mail-order plants were hybrids or chimera).

Hirts SAID they were Lavatera thuringiaca 'Barnsley', but they never looked bicolor at any point.

From reading, I guess real 'Barnsley' is a "periclinal chimaera" of the cultivar 'Rosea', (and something else??). It can revert to plain 'Rosea' under stress, and I suppose my tiny tiny plugs were stressed before I moved them outside and they had a chance to flower.

But I would guess that seed collected fom a "chimera" would be at least as variable and untrue to the parent as F2 seed from an F1 hybrid parent.

I don't know: would you like any seeds from whatever-it-is?

P.S. This bush is totally perennial for me. I cut it down to 6" every winter, but they have come back for me 2 years now. I'm Zone 8, and what I read says they're hardy to Zone 5 or so.