1.genus Rhynia - type genus of the Rhyniaceae; small leafless dichotomously branching fossil plants with terminal sporangia and smooth branching rhizomesRhyniafern genus - genera of ferns and fern alliesfamily Rhyniaceae, Rhyniaceae - primitive plants of the Paleozoic
genus Rhynia - type genus of the Rhyniaceae; small leafless dichotomously branching fossil plants with terminal sporangia and smooth branching rhizomes