Sick rosebush?

Sick rosebush?

I posted a couple of days ago about when to prune and do other gardening tasks. Thanks for the advice! This morning I went out to clip the dead ends off the climbing roses. When I got a closer look, I started wondering if maybe I'm dealing with a disease instead of just natural dying off over time. There's a white/gray layer to the bark (skin? whatever) of the limbs that looks suspicious to me, but for all I know, roses do this as they get older. Advice, please? ETA: Fixed one picture that I'd repeated.
What is this flower called?

What is this flower called?

Wilt

Wilt

Dudleya?

Dudleya?

plant ID help

plant ID help

Today on my allotment

Today on my allotment

Flower pickings for today

Flower pickings for today