This willow-herb is also called bog or narrow-leaf. The flowers are about an inch long. They're widespread and common, but always fun to spot because there never seems to be very many of them anywhere the grow. And because if you see it that means you're slogging a bog or fen! I know they grow at Ives, but I can't remember seeing any for years. It grows in AK, AL, CA, CO, CT, DE, IA, ID, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SD, TN(T), UT, VA, VT, WA, WI, WV, WY, AB, BC, MB, NB, NF, NS, NT, ON, PE, QC, SK, and on SPM. Lenawee Co MI, 8/31/14.