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Cycadophyta

Cycadophyta

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Cycadophyta

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  1. Cycadophyta By: Varsha Bhatnagar, Amy Hodgson, and Nicole Nicholas

  2. Appearance:BEAUTIFUL!!

  3. Facts: • Extremely ancient (280 million years ago), coexisted with dinosaurs • Seed Plant • Characterized by a large crown of compound leaves and a stout trunk • Evergreen gymnosperms: plants that have seeds, but no flowers • NOT palms or ferns because: cycads have naked seeds born in cones, while palms are flowering plants whose seeds develop in fruits

  4. More Facts: • Dioecious: separate male and female plants • Male plants produce large cones • Cycads are long-lived, slow-growing, and have a low reproductive rate. • Found in subtropical and tropical parts of the world, can grow in semi-desert climates, in the sand, or even on rock, can thrive in either the sun or shade, and grow in small localized populations

  5. Fun Facts: • Their roots contain cyanobacteria that exists in a symbiotic relationship (benefit both organisms) with the plant, and provide it with further nutrients by converting atmospheric nitrogen into a usable form • Only one species of cycad, Zamia pumila, has a range that extends into the United States. The distribution of this species includes southeastern parts of Georgia and southern parts of Florida where it is currently endangered. • Seminole Indians of the southeastern United States made use of the starchy matter in the stems of the cycad as an ingredient in bread. Although, most cycads contain toxic compounds within their tissues and seeds. • The roots of the cycad are retractable for protection against drought and fire

  6. Fun Facts Continued… FEMALE CONES • There is some indication that the regular consumption of starch derived from cycads is a factor in the development of Lytico-Bodig disease, which is a neurological disorder with symptoms similar to those of Parkinson’s disease • Cycads were long thought to be pollinated by the wind. It has been shown, however, that beetles and small bees are important pollinators of these plants. Some cycads produce heat or odors to attract these insects. MALE CONES

  7. Works Cited: • http://www.nd.edu/~fboze/cycads.shtml • http://www.zoo.org/factsheets/cycads/cycads.html • http://www.arkive.org/cycad/cycas-clivicola/info.html