I've always fancied that dog roses were named for their teeth. They have very sharp thorns that can grow to almost an inch long on older branches. The hips of dog rose are relatively large, and a very good source of vitamin C. Historically, dog rose was often used as food, particularly in preserves, and in medicine. It was grown in victory gardens during World War II. Originally from Europe, western Asia and North Africa, it now grows in many places around he world. Here it has been reported from AL, AR, AZ, CA, CT, ID, IL, IN, KS, KY, MA, MD, ME, MI, MO, NC, NE, NJ, NM, NY, OH, OR, PA, RI, TN, UT, VA, VT, WA, WI, WV, BC, NB, NS, ON, and QC. Lenawee Co MI, 5/30/10.