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Cycads resemble arms, yet are taxonomically relatively various. they seem to be a major and irreplaceable element of the planet's organic variety, having developed a number of and sometimes designated morphological, anatomical and biochemical beneficial properties in the course of their 250-million-year evolutionary background. Many cycad species exist this day basically as small, poorly-known or remoted populations or as decorative species in botanic gardens. so that it will comprehend totally, in addition to to preserve, this the world over endangered tropical plant workforce, it really is paramount that cycad systematics are studied, documented and subtle. This quantity provides the present country of our wisdom of the systematics of the nearly three hundred species of cycads. It contains contributions from best researchers from Australia, China, Italy, Mexico, South Africa, Thailand and america. it's been constructed from papers offered at a workshop held in 2002, on the Montgomery Botanical Center.

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