Here are some herbs that can help dream recall and get you to pass right out.
Valerian root, passion flower, wild lettuce. (valerian can be compared to a pain killer sedative)
If you don't need the knock out one this will just be calming have increase vividness.
Mugwort, passion flower, wild lettuce, lotus leaf.
ginkgo biloba tastes pretty bitter but good for memory.
I hear
Calea Zacatechichi is one of the best but I haven't been able to try it seeing as its not at my local herb shop.
Patchouli Leaves
Theres much much more, in fact herbs can do many things :)