Back in the late 60's and early 70's, when I first toked, we did try to read what we could about this wonderful herb, but there wasn't much to read. Somebody had a paperback copy of "A Children's Garden of Grass" that was read by about 15 people. I remember reading about Cannabis Sativa L. I took a long break through the 90's and only been back about a year and a half. But now they talk about the major strains being: Cannabis Sativa. Cannabis Indica, and Cannabis Ruderalis. Is this correct?