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Cassytha
''Cassytha'' is a genus of some two dozen species of obligately parasitic vines in the family Lauraceae. Superficially, and in some aspects of their ecology, they closely resemble plants in the unrelated genus ''Cuscuta'', the dodders.〔Weber, J. Z. A TAXONOMIC REVISION OF CASSYTHA (LAURACEAE) IN AUSTRALIA. J. Adelaide Bot. Gard. 3(3): 187-262(1981) PDF @ http://www.environment.sa.gov.au〕 The physical resemblance is so close, when fruit and flowers are absent in the field, few people without technical training can tell them apart. The two genera present a spectacular example of convergent evolution.〔Nickrent, D. L. 2002. Phylogenetic Origins of Parasitic Plants. Chapter 3, pp. 29-56 In J. A. López-Sáez, P. Catalán and L. Sáez (), Parasitic Plants of the Iberian Peninsula and Balearic Islands. Mundi-Prensa, Madrid.〕 In its divergence from habits typical of the Lauraceae, ''Cassytha'' also presents examples of mosaic evolution〔Kuijt, J. 1969. The Biology of Parasitic Flowering Plants. University of California Press, Berkeley, CA.〕
Several species of ''Cassytha'' are regarded as pests in some regions, though in general they are not as serious a problem as the true dodders. Some even yield a welcome harvest of fruit, or are valued for their perceived medicinal or aphrodisiac properties, partly because, like many members of the Lauraceae, some are fragrant when bruised.〔http://florabase.dec.wa.gov.au/browse/profile/21448〕 Their stems make useful strings for construction of thatched roofs and certain styles of lei and the like.〔http://www.enature.com/fieldguides/view_default.asp?allSpecies=y&searchText=Cassytha%20filiformis〕
==Common names and confusion==
Probably the most useful common names for ''Cassytha'' species are laurel dodder or dodder laurel, because they look like dodder and are in the laurel family, Lauraceae. The name love vine has merit because some species, in particular ''C. filiformis'', are regarded as aphrodisiacs in the Caribbean region.〔Esbaugh, W. Hardy; McClure, Susan A. & Bolyard, Judith L. Bush Medicine Studies, Andros Island, Bahamas. Proceedings of the first symposium on the botany of the Bahamas 11–14 June 1985. Ed. Robert R. Smith., San Salvador, Bahamas.〕
〔http://consejo.bz/belize/bushmedicine.html〕 In practice, however, the confusion between the various species of ''Cassytha'' and ''Cuscuta'' is so natural, their common names are more or less interchangeable. Practically all the common names for dodder are widely applied in error to ''Cassytha'', as well, but as a matter of convenience in Florida at least, where members of both groups of plants are present as agricultural pests, a publication of the Department of Agriculture adopts the names woe vine for ''Cassytha'' and dodder for ''Cuscuta''.〔Haynes, Alan R., Coile, Nancy C., Schubert. Timothy S.; "Comparison of Two Parasitic Vines: Dodder (Cuscuta) and Woe Vine (Cassytha)". Botany Circular No. 30. Fla. Dept Agric. & Consumer Services January/February 1996. Division of Plant Industry〕
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