asplenium nidus(n = noun.plant) bird's nest fern - tropical Old World or Australian epiphytic fern frequently forming tufts in tree crotches;
is a kind of fern
is a member of asplenium, genus asplenium

asplenium, asplenium adiantum-nigrum, asplenium billotii, asplenium bradleyi, asplenium ceterach, asplenium montanum, asplenium nigripes, asplenium pinnatifidum, asplenium platyneuron, asplenium rhizophyllum, asplenium ruta-muraria, asplenium scolopendrium, asplenium trichomanes, asplenium viride, genus asplenium, nidus