Named after Lester Grinspoon, Harvard professor and cannabis advocate, this sativa is a top choice for creative, introspective thinkers, as it induces heightened cerebral activity and sensory awareness. Dr. Grinspoon buds, imbued with rich earthy and honey flavors, grow like berries on twig stalks in unusually far-spaced popcorn formations. Patients with mood disorders, attention deficit, and chronic pain may find relief in the euphoric and invigorating experience that defines this legendary sativa.