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.
Ferns, horsetails, & club mosses are seedless vascular plants that reproduce by spores. Plants that reproduce by seeds are divided into 2 groups --- gymnosperms & angiosperms. Gymnosperms have naked seeds usually protected by cones & includes pines, cedars, spruce, fir ...