Fern sori, clusters of meiosporangia on the underside of the leaf
Spores produced in a sporic life cycle.

A simple reproductive body, usually composed of a single detached cell, and containing no embryo.CH


Read about Spore in the Standard Cyclopedia of Horticulture 

Spore, a reproductive detached cell of a cryptogamous or so-called flowerless plant, not containing an embryo as does a seed. Spores are the reproductive bodies of ferns, mosses, club-mosses, liverworts, fungi, and similar plants. They are of interest to the plant- grower mostly as the means of propagating ferns. For description, see Ferns and Fungi; also the articles on Mildew, Rust, and Smut. For propagation by spores, see the discussion under Ferns.


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This article contains a definition from the Glossary of Gardening Terms.