And we're back in the blackberry thicket! It's a thorny problem. Try to sort and name the thickets, and you will soon meet a flummox. Blackberries vary endlessly. You can try to give each combination of characteristics a name, and end up with hundreds of microspecies. Or you can opt for various broader lumps of somehow similar characters. Quoted in Flora of North America, R. K. Godfrey says, "oversimplification appears to be the only way to achieve a practicable solution to the dilemma." Easy to go with that here. That's also what the University of Michigan Herbarium does. But I bet you that after the shelves of neatly lumped specimens, there are shelves marked "Rubus undetermined". In the end you take the shot, or eat the berry, and enjoy the puzzles. In this version, this one grows in AL, AR, CA, CT, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NE, NH, NJ, NY, OH, OK, PA, RI, SC, TN, TX, VA, VT, WA,WI, WV, NB, NF, NS, ON, PE, and QC. Riley Preserve, Scioto Co OH, 5/27/20. Rose family, Rosaceae.