Hemlock names both a shade-loving conifer and a poisonous plant of old stories, so dream books read it as something that looks harmless but carries a hidden bitterness. It points to caution, not to danger foretold.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.