| a common freshwater fern, Marsilea quadrifolia, of lake edges and quiet ponds, having roots embedded in the bottom, very slender and often tangled stems, and floating, cloverlike leaves composed of four leaflets. |
pep·per·grass  (pěp'ər-grās')  n. Any of several plants of the genus Lepidium, especially the North American species L. virginicum, having small white flowers and pungent foliage and seeds. Also called peppercress, pepperwort. |
| pep·per·wort (pěp'ər-wûrt', -wôrt') n.
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ərˌwɜrt