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Order of Cycadales

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Main Diagram Plant Order List


Species: 65

Families in Cycadales
1) Cycadaceae
2) Stangeriaceae
3) Zamiaceae


Cycadales
Cycads are a group of seed plants characterized by a large crown of compound leaves and a stout trunk. They are evergreen, gymnospermous, dioecious plants having large pinnately compound leaves. They are frequently confused with and mistaken for palms or ferns, but are only distantly related to both, and instead belong to the division Cycadophyta.
Cycads are found across much of the subtropical and tropical parts of the world. They are found in South and Central America (where the greatest diversity occurs), Mexico, the Antilles, south-eastern United States of America, Australia, Melanesia, Micronesia, Japan, China, Southeast Asia, India, Sri Lanka, Madagascar, and southern and tropical Africa, where at least 65 species occur. Some are renowned for survival in harsh semi-desert climates, and can grow in sand or even on rock. They are able to grow in full sun or shade, and some are salt tolerant. Though they are a minor component of the plant kingdom today, during the Jurassic period they were extremely common.
They have very specialized pollinators and have been reported to fix nitrogen in association with a cyanobacterium living in the roots. This blue-green algae produces a neurotoxin called BMAA that is found in the seeds of cycads.

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Zamiaceae
Zamia Family
Cycadales
Cycadales
Cycas Order
Spermatophytes
Spermatophytes
Seed Plants
Euphyllophytina
Real Land Plants
Polysporangiates
Multiple Spore Sub-Kingdom
Stomatophytes
Stomatophytes
Air Pores Sub-Kingdom
Embryophytes
Embryophytes
Multicellular Land Plants
Streptobionta
Streptobionta
Multicellular Plants
Plantae
Plantae
Plants
Eukaryota
Eukaryota
Cells with a Nucleus
1
Cycadaceae Family

2
Stangeriaceae Family

3
Zamiaceae Family


http://en.wikipedia.org/wiki/Cycadales


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