BRYOPHYTES ASSOCIATED WITH HART'S TONGUE FERN (ASPLENIUM SCOLOPENDRIUM VAR. AMERICANUM) ON DOLOMITE ROCKS IN MACKINAC COUNTY, MICHIGAN

摘要

Nineteen bryophyte taxa were found within the circle of influence of the hart's tongue fern. These formed zonation patterns on individual rocks, with pleurocarpous mosses such as Thuidium recognitum, Anomodon attenuatus, Brachythecium spp., and Plagiomnium affine predominating. One- and two-year-old fern sporophytes were found in disturbed patches where the thick moss mats were missing and only a thin layer of young mosses, fern and moss rhizoids, and detritus covered the rock. Older sporophytes occurred predominantly on the sides of rocks where they were supported by thick mats of mosses.