RISK, ALLEN C. Dept. of Biol. and Env. Sc., Morehead State University, Morehead, KY 40351. - On the distribution, abundance, biology, and habitat of Fissidens hyalinus Wils. & Hook.
Fissidens hyalinus is often considered to be one of the rarest
mosses in the eastern United States. The species, however, is much
more abundant than has previously been assumed. Sixty-five new
collections of F. hyalinus, in combination with previous
collections, document the species from 28 counties, 7 states, and 5
major physiographic provinces. The species is most abundant on bare
soil of streambanks in steep and deeply dissected landscapes with
calcareous geology and mixed deciduous forests.
Key words: Fissidens hyalinus, Fissidentaceae, moss