Just minutes from downtown Boston, the Blue Hills Reservation is the largest conserved tract in the greater Boston area. It contains many wild treasures—from coyotes to copperheads, dogwoods to lady’s-slippers, and turkey vultures to dragonflies—and, of course, a wealth of fern species. Hiking along the northern Border Path, you will see more than a third of all the fern species native to Massachusetts as well as some hybrid ferns, several club-mosses, and a horsetail. Wear long pants (there is poison ivy on the trail) and suitable footwear; bring a hand lens if you have one, and plenty of water. The hike is sponsored by the New England Wild Flower Society on Saturday, June 14, from 12-4, and the fee is $23 for NEWFS members, $28 for nonmembers. Led by Don Lubin. You may register at http://www.newfs.org/learn/catalog/fdt1032.