How to recognize Drepanocladus aduncus: These carpet forming plants are one of the “brown” mosses commonly found in wetlands or fens. The ovate-lanceolate leaves have a single costa and are commonly very sickle-shaped (falcate-secund), although there is one form (var. kneiffii) that has straight leaves. The plants with falcate-secund leaves often look hook-shaped at the end of the stem and branches. The irregularly or pinnately branched plants vary in color from golden green to brownish. Under the microscope the alar cells are enlarged and bulging but do not reach the costa.
Where to find Drepanocladus aduncus: Look on humus and rotting sticks in fens, swamps, and vernal pools.