Ferns – like humidity. Ferns are some of the oldest plants and over time managed to adapt to many changes. Therefore, these are quite easily grown.
Orchids – these tropical plants do well in light bathrooms.
Lucky Bamboo (Dracaena braunii) – an easy to grow plant either hydroponically or in a substrate. It also is not a plant that demands much light.
Tilandsie (Spanish Moss) – is a plant that grows almost on nothing.
Ivy – an easy growing, climbing plant. There are different types. Careful, some of them are poisonous.
Devil's ivy (Pothos or Money Plant) – has very similar characteristics to the one above. Often you see the plant growing new roots once a cut portion stays in just water. It is also a climber and a fast spreading plant that can adapt to almost any environment.
Chlorophytum comosum (Spider plant) – one more from the category with almost no care required. It will keep growing.
Aloe Vera – a succulent that will do well in the bathroom. They need at least a little bit of light
Spathiphyllum (Peace Lily) – for those who prefer blossoms and appreciate the liveliness of the plant