a-Pinene: Found in pine and other evergreens, rosemary, basil, orange peels and parsley, this terpene is stimulating, anti-inflammatory, and a memory enhancer. And while a-Pinene smells a lot like a forest of pine trees, it brings a lot more to a strain's experience than just flavor. a-Pinene is the most common terpene in the world and many have found it's often useful for pain, inflammation, anxiety and that it may also be a bronchodilator (helps open airways).