gymnospermae

• 一类种子植物的分类群，其种子裸露，不包裹在子房内，包括松柏类、苏铁类、银杏和买麻藤类。

A taxonomic group of seed plants whose seeds are not enclosed within an ovary, including conifers, cycads, ginkgo, and gnetophytes.

不可数 · 专有名词

1. Naked seed plantsC2formalscientific

   A group of seed-producing plants whose seeds are not enclosed within an ovary, but are exposed on the surface of cone scales or similar structures.

   裸子植物

   • Gymnospermae includes conifers, cycads, ginkgo, and gnetophytes.
   • The seeds of Gymnospermae are often called 'naked seeds' because they lack a protective fruit.
   • Pine trees are a well-known example of Gymnospermae.