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Modified213-page7 - They secrete enzymes that digest the...

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Modified Structures - 7 Special Leaves Showy bracts Bracts are leaves that subtend (are below) the inflorescence (the flowering shoot). In some plants these are showy, and take on the function of attracting pollinators, a function that is usually performed by the petals of flowers. Some examples of plants that have showy bracts are: Poinsettia, Bougainvillea Dogwood ( Cornus ) Dogwood bracts Bougainvillea bracts Poinsettia bracts Carnivorous plants Carnivorous or insectivorous plants have modified leaves which are specialized to trap insects or other small animals. There are a variety of such plants, most of which are adapted to habitats where available nitrogen is scarce.
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Unformatted text preview: They secrete enzymes that digest the protein of the captured animal to obtain sufficient nitrogen for growth. The method of trapping varies: • Some have trigger hairs that cause the leaves to fold over the insect • Some have sticky glandular hairs to which the insect sticks • Some have air bladders that aquatic animals swim into and cannot escape from • Some have cylindrical leaves with fluid in the bottom into which the insect falls, or slides, and then drowns, or gets trapped in. Some examples of insectivorous plants are: Sundew Pinguicula (Butterwort)...
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