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.
Nonvascular plants (mosses, hornworts, liverworts) 2. Ferns. These are the most well represented of the seedless plants. Most ferns have fronds, compound leaves divided into several leaflets.As the frond develops it uncoils from a structure called a fiddle head.his plant had vascular tissue and a new type of reproductive structure called the seed. These plants contained these seeds in structures called cones. The leaves of most of the gymnosperms are needle-like structures. These needles contained a thick cuticle and reduced stomata.