HORTICULTURE

Detailed explanation-1: -In gymnosperm ovules are not enclosed by ovary wall . Seeds do not occur inside a fruit . They are naked . Horsetail is the common name of Equisetum .

Detailed explanation-2: -Fern does not belong to the Gymnosperm. Cycas, Pinus and Ginkgo are the examples of Gymnosperm. Fern is an example of Pteridophytes.

Detailed explanation-3: -Biology: In the plant world, equisetum is most closely related to ferns. Like the ferns, they do not produce seed, but rather reproduce sexually through the formation of spores. Spores are relatively unimportant in the spread of equisetum.

Detailed explanation-4: -Vascular plants include the horsetails, Ferns, gymnosperms, and angiosperms. Horsetails are seedless vascular plants that reproduce with spores and are found in a moist environment. In angiosperm, ovules are enclosed by the ovary. In gymnosperm, ovules are not enclosed by an ovary wall.