This is my seed grown crispa.
Today I found the leaves with brownish streaks. What is it?
Also a few leaves toward the top is wilting.
What is happening here?
You might want to use Google "images" and look for: fungus on clematis leaves.
Are you keeping it just damp or really wet?
Just damp...more leaves are being affected!!!
Here's a Google "images" page on fungal infected clematis leaves:
If you're not afraid of using fungus sprays, then use it on the clematis. I fear the spray since I saw on one label "Causes blindness", not even "may cause blindness". If it happened to my clematis I'd use a fungal powder, available at nurseries and most likely the big box stores. Keep your eyes and mouth covered!