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.
Cycads are also non-flowering plants but have sculptural cone-like structures and often-colourful seeds. We have information on a range of different types of ferns, palms and cycads from the Birdâs Nest Fern to the Coconut Palm and many more ferns, palms and cycads. As well as advice on the soil and sunlight needs of ferns, palms and cycads.