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Unformatted text preview: Rhizoids, found on the rhizomes, associate with mycorrhizae for absorption of water and nutrients. Enations, small scalelike structures spiral up the stem, and are often thought of as miniature leaves. Psilotales - 2 Dichotomous branching Sporangia Gametophyte Psilotum is homosporous and produces three-lobed sporangia in enation axils. Psilotum gametophytes are nonphotosynthetic and subterranean. They are cylindrically shaped dichotomously branched saprobes that have mycorrhizae for absorption of nutrients and water. The gametophytes are bisexual; both archegonia and antheridia are found along the surface of one gametophyte. The sperm are multiflagellated and require water for transport to archegonia....
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