Passionflower is a beautiful climbing vine native to the Americas whose corona reminded people of the crown of thorns worn by Jesus during his crucifixion. It's a sedative, milder than valerian or kava - often, you'll find it used in combination with other calming herbs like lemon balm. Passionflower calms the nervous system, reduces anxiety, and soothes insomnia and muscle spasms. Scientists think it increases levels of gamma aminobutyric acid (GABA) in the brain. Don't use passionflower if you're pregnant or breastfeeding; it's a uterine stimulant that can over-sedate your baby.