Aspen leaftier 
Aspen oyster mushroom 
Aspen Serpentine Leafminer Moth 
Asperula libanotica 
Asperula setosa 
Asphaera albomarginata 
Asphaera boliviensis 
Asphodeline brevicaulis 
Asphodeline globifera 
Asphodelus macrocarpus 
Asphodelus refractus 
Asphodelus tenuifolius 
Asphodleine taurica 
Asphondylia rudbeckiaeconspicua 
Aspicela bourcieri 
Aspicela scutata 
Aspidapion aeneum 
Aspidimorpha sanctaecrucis 
Aspidogyne rosea 
Asplenium adiantum-nigrum 
Asplenium nidus 
Asplenium tenerum 
Asprenas impennis 
Ass's-ear abalone