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.
Wood fern (Dryopteris) Plant these delicate, medium-sized ferns in mixed borders to show off their feathery fronds. Autumn ferns (D. erythrosora) are one of the few ferns with seasonal color variation and their fronds change from pale gold and pink in spring to green in summer and rusty copper in fall. The ferns spread by underground stems to form swaths in garden beds.
Save. Many species of ferns inhabit the lush, humid rain forests of South America, Central America, Hawaii and Malaysia. Tropical ferns are generally epiphytic but occasionally grow as thick ground cover.Epiphytic ferns -- or tree ferns -- grow on trunks of trees and receive nutrients from their hosts.awaiian Tree Ferns are epiphytic, but this species also thrives in moist soil. These ferns have green fronds with yellow midribs and reproduce via spores located at the tip of each frond.