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| | FERN.6 |
 | | The Marsileales are comprised of three genera, Marsilea, Regnellidium and Pilularia. |
 | | The reproductive structures of the Marsileales are called sporocarps: these are small bean-like structures borne singly or on branches at the base of fronds, and are produced during adverse conditions, as water availability becomes scarce. |
 | | Salvinea has a rhizome that bears leaves in whorls of three, with two of each whorl being thick, flattened photosynthetic leaves that have a thick pad of hairs on their abaxial surface that maintain them as floating plants, and a third leaf that is highly dissected, submerged and acts as a root. |
| lsweb.la.asu.edu /kpigg/modernferns&conifers.htm (2397 words) |
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