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裸子植物的特征有哪些?

网址:www.dzyangguang.com.cn  2022-03-21  作者:admin    阅读:

裸子植物的特征有哪些?
What are the characteristics of gymnosperms?
乔木,灌木,罕为木质藤本。叶多为针形、鳞形、条形、椭圆形、披针形、罕为扇形;花单性,罕两性;胚珠裸露,不为子房包被;种子有胚乳,胚直生,子叶二至多数。
Trees, shrubs, rarely woody vines. The leaves are mostly needle shaped, scale shaped, strip-shaped, oval, lanceolate and rarely fan-shaped; Flowers unisexual, rarely bisexual; Ovule naked, not covered by ovary; The seed has endosperm, the embryo is straight, and the cotyledons are two to many.

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