The southern flannel moth, or puss moth caterpillar, Megalopyge opercularis. In Texas these caterpillars are commonly known as “asps”. appeared on my climbing rose in NW Houston

https://citybugs.tamu.edu/factsheets/biting-stinging/others/ent-3010/

Be very careful with this guys as they have painful stingers.  It is easy for pets or children to be curious about this "ugly" looking thing.