The sections of the light spectrum which the âredâ and âgreenâ cones perceive overlap and this is why red and green colour vision deficiencies are often known as red/green colour blindness and why people with red and green deficiencies see the world in a similar way.
Boston Fern The most common indoor fern, Boston ferns are long-lived plants that can reach more than 5 feet tall and wide at maturity (though indoors they rarely reach that size). Fern breeders have released a large number of varieties -- from selections with golden fronds to fantastically frilled fronds.
Some of the succulent plant types commonly available are: 1  Agaves. 2  Yucca. 3  Aloe. Cacti. 4  Bromeliad. Sedum. 5  Sempervivum. Echeveria.  Various 1  euphorbias. Some types of  orchids.