The fuzz-covered newborns that can be seen unrolling from their fetal positions near the cedar swamp in Wellfleet this week are the fresh fronds of cinnamon fern, Osmundastrum cinnamomeum, an ancient species that has been unfurling each spring since the Triassic. These fiddleheads will stretch out into arching (and sporeless) leaves that give the plant an elegant, vase-like shape. Meanwhile, a second round of fronds will emerge from the base and shoot skyward, fertile and stiff and turning from green to brown as they mature, their shapes and colors are the bits that are reminiscent of cinnamon sticks.