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.
Plants commonly referred to as Hens and chicks include ground-hugging species of Sempervivum (houseleeks) such as Sempervivum 'Pekinese', S. arachnoideum (cobweb houseleek), and S. arachnoideum (common houseleek), as well as members of the related genus Jovibarba.