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Washington Flora Checklist A Checklist of the Vascular Plants of Washington State Hosted by the University of Washington Herbarium |
About| Hydrocharitaceae (Frogbit or Tapegrass or Waterweed Family) |
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Notes: FNA editors insisted on following Cronquist (1981) in recognizing Najadaceae, and the author's introduction to Najadaceae in FNA (Haynes 2000) protested Cronquist's treatment was outdated, citing recent papers investigating seed coat (Shaffer-Fehre 1991) and molecular relationships (Les & Haynes 1995). That evidence places Najadaceae within Hydrocharitaceae. Here we combine the two, as in JPM. Family Synonyms: » Vallisneriaceae
Literature: » Shaffer-Fehre, M. 1991. The position of Najas within the Alismatidae (Monocotyledones) in the light of new evidence from seed coat structures in the Hydrocharitoideae (Hydrocharitaceae). Bot. J. Linn. Soc. 107: 189-209.
» Les, D. H. & R. R. Haynes. 1995. Systematics of subclass Alismatidae: A synthesis of approaches. In: Rudall, P.J., et al., eds., 1995. Monocotyledons: Systematics and Evolution. 2 vols. Kew. Vol. 2, pp. 353-377.
Family treatment authored by Peter F. Zika; last updated 10/21/2003 by Peter F. Zika
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| Taxon (native species in boldface) | # Synonyms | Common Names |
| Egeria densa Planch. [FNA22] | 1 | Brazilian waterweed, waterweed, South American waterweed |
| Elodea canadensis Michx. [FNA22, H&C] | 2 | Canadian, Rocky Mountain, or common waterweed |
| Elodea nuttallii (Planch.) H. St. John [FNA22, H&C] | 1 | Nuttall's or western waterweed |
| Hydrilla verticillata (L. f.) Royle [FNA22, not in H&C] | 1 | hydrilla, water thyme |
| Vallisneria americana Michx. [FNA22, H&C] | 3 | tapegrass, wild celery, eelgrass, American eelgrass |
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