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.
Pterophyta. Plants in the Pterophyta division are the most familiar seedless vascular plants. They are commonly called ferns and have divided, feathery leaves called fronds. Ferns grow well in damp shady areas, such as woodlands or along stream banks, and the rhizomes and roots of ferns help prevent soil erosion.