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Biological Diversity 5 |
 | | Major living lycophytes include Lycopodium (commonly called the club moss, although it is NOT a moss), Isoetes, and Selaginella (the resurrection plant). |
| | Selaginella and Isoetes produce two sizes of spores: small spores (microspores) that germinate to produce the male gametophyte; and larger spores (megaspores) that germinate to produce the female gametophyte. |
| | The production of two sizes of spores, and also making separate unisexual gametophytes, is thought an important step toward the seed. |
| www.estrellamountain.edu /faculty/farabee/BIOBK/BioBookDiversity_5.html (2710 words) |
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