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.
Fern is a vascular, seedless plant that belongs to the group Pteridophyta. There are around 12 000 types of ferns that differ in size, morphology and type of habitat.Ferns can be found throughout the world. They live in shady places that provide enough moisture, such as forests, fields, swamps and areas near the streams. Fern can survive in various climates and on different altitudes.ern is a vascular, seedless plant that belongs to the group Pteridophyta. There are around 12 000 types of ferns that differ in size, morphology and type of habitat.