苏铁植物分11属共200余种，其中许多种的化学成分和药理作用已陆续有报道。

There are 11 genus with about 200 species of cycads in the world, and the chemical constituents and pharmacology of many species have been reported.

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实验表明，昆虫能充当苏铁科植物、罕见热带植物、棕榈状热带植物的授粉者。

Experiments show that insects can function as pollinators of cycads, rare, palmlike tropical plants.

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苏铁类植物一年开花一次。

The flowers of Cycads come out once a year.

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