Colpate is a botanical term used to describe plant leaves with a distinctive ridge or fold down the center. If you're looking for other ways to describe this characteristic, consider using synonyms such as furrowed, creased, or striated. You could also use words like ribbed, veined, or grooved to describe the central structure of a colpate leaf. If you're writing about the surface texture of the leaf, words like grooved or striated may come in handy. Overall, there are many words you can use to describe the unique features of colpate leaves, so don't be afraid to get creative with your vocabulary!