Psilotaceae
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Description: Division/family description and thumbnail links to images of two species of Psilotum from Hawaii.
Non-Flowering Plant Families, UH Botany Psilophyta. The Psilotaceae are leafless and rootless terrestrial or epiphytic homosporous, protostelic vascular plants comprising 2 genera and less than ten species. The free-living sporophytic plant body is a dichotomously branching stem consisting of a subterranean mycorrhizal rhizome and a green, photosynthetic aerial portion that bears very small nonvascularized scale-like flaps of tissue called enations and 2- 3-lobed eusporangia or synangia on very short lateral branches. The independent gametophytes are bisexual, subterranean, lack chlorophyll, and depend on a symbiotic fungus for survival. Biflagellated sperm produced in an antheridium must travel through a film of water to reach the egg of an archegonium in order to initiate the zygote that may develop into a new sporophyte individual.
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| Page title: | Non-Flowering Plant Families, UH Botany |
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