![]() ![]() The North American genus Sarracenia are the trumpet pitchers, which have a more complex trap than Heliamphora, with an operculum, which prevents excess accumulation of rainwater in most of the species. They are restricted to areas of high rainfall in South America. ![]() ![]() The species of the genus Heliamphora, which are popularly known as marsh pitchers (or erroneously as sun pitchers), have a simple rolled-leaf pitcher, at the tip of which is a spoon-like structure that secretes nectar. In this family, the entire leaf forms the pitcher, as opposed to Nepenthaceae, where the pitcher arises from the terminal portion of the leaf. The New World pitcher plants (Sarraceniaceae), which comprise three genera, are ground-dwelling herbs whose pitchers arise from a horizontal rhizome. The plants themselves are often climbers, accessing the canopy of their habitats using the aforementioned tendrils, although others are found on the ground in forest clearings, or as epiphytes on trees. Old World pitcher plants are typically characterized as having reduced and symmetrical pitchers with a comprehensive waxy coating on the surface of the inner pitcher wall. In this genus of Old World pitcher plants, the pitchers are borne at the end of tendrils that extend from the midrib of an otherwise unexceptional leaf. The Nepenthaceae contains a single genus, Nepenthes, containing over 100 species and numerous hybrids and cultivars. The families Nepenthaceae and Sarraceniaceae are the most species-rich families of pitcher plants. The term "pitcher plant" generally refers to members of the Nepenthaceae and Sarraceniaceae families, but similar pitfall traps are employed by the monotypic Cephalotaceae and some members of the Bromeliaceae. The plants attract and drown their prey with nectar. The traps of what are considered to be "true" pitcher plants are formed by specialized leaves. Pitcher plants are several different carnivorous plants that have modified leaves known as pitfall traps-a prey-trapping mechanism featuring a deep cavity filled with digestive liquid. Pitcher plants growing in a bog in Pennsylvania ![]()
0 Comments
Leave a Reply. |