When I visited the ginseng, my host's garden had some of these. Couldn't resist a shot, just as I can't resist putting it up here. The mathematical precision is so fantastic! Previously we've talked about the Fibonacci sequence that describes the number of spirals in such plant structures. The physics and chemistry that ultimately appears as this flower is so incredible to contemplate. But beyond that, it turns out that Fibonacci pervades our existence. Beyond describing the spirals of a pineapple or pinecone, it tells me how many of my ancestors in successive generations could have contributed an X chromosome. The applications seem to increase almost as fast as the sequence (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, . . .). This flower with 21 spirals has been seen outside our gardens in AK, AR, CA, CO, CT, IA, ID, IL, MA, MD, ME, MI, MN, MO, MT, ND, NH, NJ, NY, OH, OR, PA, RI, SD, UT, VA, VT, WA, WI, WV, WY, AB, BC, MB, NB, NF, NS, ON, QC, and SK. Lenawee Co MI, 6/26/19.