植物区系

plant genera的用法和样例：

例句

In seed plant flora, the floristic composition is dominated by the temperate elements, which have tight relation to tropic elements.种子植物区系以温带成分占优势，与热带成分有紧密的联系。
Pteridophyte floras in Tianhuashan Natural Reserve were studied according by investigating its plant composition of the reserve.摘要在调查天华山自然保护区植物组成的基础上，对该区的蕨类植物区系进行了分析。

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