Use the adjective evocative when you want to describe something that reminds you of something else. If your mom baked a lot when you were a kid, the smell of cookies in the oven is probably evocative of your childhood.
Evocative comes from the Latin word evocare, which means to "call out" or "summon." Think of a batch of cookies summoning a memory from your childhood. To summon something you need a voice, and indeed, the Latin word for voice is vocare. Other related words include the noun vocation, which means "a calling."