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汉语拼音：luǒ zǐ zhí wù

种子植物的一大类，胚珠和种子都是裸露的，胚珠外面没有子房，种子外面没有果皮包着，松、杉、银杏等都属于裸子植物（区别于“被子植物”）。

• Its native gymnosperms could evolve into a few species capable of growing in the warm, moist forests of Queensland.

  本地的裸子植物可进化成能在昆士兰温暖湿润林区的树种。

• Only dicotyledonous flowering woody plants and most gymnosperms have true twigs; monocotyledons and tree ferns do not.

  只有双子叶的木本开花植物和大部分的裸子植物才有真正的小枝，而单子叶植物和树蕨类植物则没有。

• Based on this database, we chose the part of gymnosperms and gave a discussion to the features of its chromosomes' evolution and variation.

  基于数据库的统计资料，我们选取了裸子植物类群对其染色体的变异和演化特征做了探讨。

• In gymnosperms , the egg into the neck with only one of the two sperm and egg fusion.

  在裸子植物中，进入颈卵器的两个精子只有一个与卵融合。

• We also performed the cytological mechanism study of fertilization for gymnosperm Chinese pine (Pinus tabulaeformis).

  在本项目的资助下，我们也对裸子植物油松受精过程的细胞学机制进行了探索。

• Late Permian a ginkgo, cycads, the cycads, conifers and other gymnosperms , the show began with the appearance of health.

  晚二叠世出现了银杏、苏铁、本内苏铁、松柏类等裸子植物，开始呈现中生带的面貌。

• used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales.

  用于某些分类系统中；一个灭绝的裸子植物化石群，与苏铁蕨目同域。

• From the present results, we considered that tracheary elements that conduct water and mineral in ferns and gymnosperm are tracheids .

  由此可以推测蕨类植物和裸子植物中输导水分和矿物质的管状分子主要为管胞。

• A multicellular, often flask - shaped, egg - producing organ occurring in mosses, ferns, and MOST gymnosperms.

  藏卵器在苔藓、蕨类及大多数裸子植物中的多细胞的，常为烧瓶状的产生卵子的器官