I tried to look up what these clouds might be so I checked Wikipedia. I thought they were castellated cumulus, but now I think they are Altocumulus_castellanus_cloud.
The clouds in the photo are a bit more broken up than these but they do seem to have a sort of towering effect. Anyway there are so many cloud types and shapes, and new types are being identified, like Asperatus. Can you tell I like clouds?