pellaea rotundifolia(n = noun.plant) button fern - fern of New Zealand and Australia having trailing fronds with dark green buttonlike leaflets;
is a kind of fern
is a member of genus pellaea, pellaea

campanula rotundifolia, cardamine rotundifolia, genus pellaea, mentha rotundifolia, pellaea, pellaea andromedifolia, pellaea atropurpurea, pellaea mucronata, pellaea ornithopus, pyrola rotundifolia, pyrola rotundifolia americana, salvinia rotundifolia, smilax rotundifolia, vitis rotundifolia