M. spectabilis may refer to:
Macrocybe spectabilis, a mushroom species Madhuca spectabilis, a tree species Malus spectabilis, a crabapple species Manilkara spectabilis, a tree species Marumba spectabilis, a moth species Melaleuca spectabilis, a plant species Melanophryniscus spectabilis, a toad species Melica spectabilis, a grass species Micropholis spectabilis, a flowering plant species Miltonia spectabilis, an orchid species Mopalia spectabilis, a mollusc species Murex spectabilis, a sea snail species Myelobia spectabilis, a moth species