Green Crack has branched into two genetic lineages, the most common of which is its sativa line descended from Skunk #1. The 75% indica variety of Green Crack is said to have come from an Afghani strain, and is marked by a tighter bud structure. If you have time when your posting run over to leafly and paste a link to the strain info.. Leafly does good work. https://www.leafly.com/sativa/green-crack