A strain is a genetic variant of cannabis. Most cannabis strains can be classified as either Cannabis Sativa or Cannabis Indica – two variations of the same basic species of cannabis that have adapted to their natural environments. Today we see the influence of hybrid genetics that combine both indica and sativa varieties. Sativas are known for their tall stature, longer flowering cycles, sweet flavors, and energizing cerebral effects. Indicas are known for their short stature, shorter flowering cycles, pungent earthy aromas, and relaxing full-bodied effects. Hybrids combine the best of both worlds now that cultivators have selectively bred strains for specific attributes like flavor, potency, and overall plant structure. Cannabis Ruderalis is another cannabis strain variant that is less common, and is mostly used in breeding projects to shorten the lifecycle and help keep plants a manageable size.