A thick, floating mass of sphagnum moss, oxygen-poor water, and plants adapted to very low nutrient conditions characterize quaking bogs. The Philbrick-Cricenti Quaking Bog, one of the best examples of these unique peatlands, offers a chance to explore a trail about a mile in length, while staying high and dry atop a boardwalk. A host of bog plants are to be discovered as you transition from a red maple-sphagnum swamp, through a black spruce-larch swamp, to the Tundra Garden Loop where you find vegetation similar to that in more northern areas where boreal forest meets the open Arctic tundra. The walk will be led by Roland “Boot” Boutwell, and is sponsored by the New England Wild Flower Society. Bring a bag lunch, water, and a hand lens if you have one.Â Cost for NEWFS members is $28, $32 for nonmembers.Â Limit 10 participants.Â To register, and for directions, log on to www.newfs.org, or call 508-877-7630.