1) Able to be called forth 2) Capable of being evoked 3) Like dormant memories 
evocable 1. Capable of being evoked or to bring to mind a memory or feeling; especially, from the past: 'He evoked childhood memories with the picture album.' 2. That which can cause a reaction, or a feeling, or to provoke a particular reaction or feeling about something or someone.
capable of being evoked.