Gymnosperms are a group of seed-producing plants characterized by "naked seeds" that are not enclosed in an ovary. Structurally, they are predominantly woody perennials.

Herbs are absent in this group because gymnosperms typically possess a vascular cambium that produces wood (secondary xylem), making them perennial and woody.

Herbs, by definition, are non-woody plants that often have a short life cycle (annual or biennial), a growth form not found in any living gymnosperm.

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