Rose stems have small ugly thorns
Plant has developed large, yellowish stems with multitude of small, ugly thorns. Other stems are okay and all stems are blooming. However, these stems look almost like throwback versions of rose development.
They could be sucker shoots that suck alot of nutrients from the bush and do not produce any or small flat blooms. Best to prune them out as far down as possible and seal the end of the cut with white Elmer's or Tacky Glue.