THE BRYOPHYTE AND VASCULAR FLORA OF LITTLE-DOLLAR-LAKE PEATLAND, MACKINAC COUNTY, MICHIGAN

Little Dollar Lake peatland is a 14 ha, lake-fill, poor fen peatland c omplex on Michigan's Upper Peninsula. Field studies over three years r evealed the peatland to be composed of seven contiguous mats character ized by several habitats. These habitats included narrow Boating mats; extensive grounded mars with hummock-hollow zonation dominated by Sph agnum spp., Chamaedaphne calyculata, and Carer oligosperma; and a lagg adjacent to the upland. Lagg habitats were dominated by Carer spp. an d Calamagrostis canadensis. The bryophyte flora of the peatland was ch aracterized by eleven species of Sphagnum that dominated the Boating a nd grounded mars surrounding Little Dollar Lake. The total bryophyte f lora (liverworts, peat mosses, and mosses) consisted of 36 species whi le the vascular flora (pteridophytes, gymnosperms, and angiosperms) co nsisted of 93 species.