What is the difference between flowering plants and non flowering plants?

Hint: Male and female gametes are carried by flowers, which are the reproductive structures of plants. After fertilisation, these flowers produce fruits. Non-flowering plants are those that do not produce flowers and reproduce by spores.
Angiosperms are plants that produce seed-bearing fruits. The process by which flowering plants reproduce is called pollination. Pollen grains are transferred from the male flower's anther to the female flower's stigma, where fertilisation and seed formation take place.

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Note:
Plant classification is the grouping and subgrouping of plants according to their affinities. Plant morphology, cytology, genetics, ecology, biochemistry, and physiology are all taken into account while classifying them.
Pteridophytes are known as vascular cryptogams because they have specialised water-transporting structures such as xylem and phloem. The most advanced flowerless and seedless plants are pteridophytes. They are the biggest living group of primitive vascular plants, as far as we know. The "first land plants" are a term that has been used to describe them.