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.
You are very observant. Neither of these are ferns at all but are true flowering plants. The asparagus fern, Asparagus setaceus, is a close relative of the edible asparagus and produces tiny white flowers and purplish black fruits. The numerous leaves are very small, bright green and produced on long branches.hey have varying degrees of green, dark red, and gray variegation on their fronds and, as a result, they are very popular plants in shade gardens. The variegated holly fern, Arachnoides simplicior var. variegata, has dark green fronds with a greenish yellow band running along the center of the main vein.