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Abstract
Studies ofNymphoides (Menyanthaceae) in Mexico, Central America, and the West Indies indicate that three species are present in this region, all of which are members of theNymphoides indica complex. White-flowered plants of Meso-America, the Antilles, and South America traditionally have been referred toN. humboldtiana but are identical to the otherwise Old WorldN. indica and must be called by the latter name. The Mexican and GuatemalanNymphoides fallax, described in this paper, differs fromN. indica in having winged yellow petals with a stipitate basal tuft of hairs, consistently yellow anthers, larger seeds, and higher altitudinal occurrence. Yellow-flowered plants of the Bahamas and Cuba are considered to represent a third species,N. grayana, which resembles plants of southern Brazil and southern Africa in flower color and morphology. However, because of the geographic distribution and unique ultraviolet-light emittance characters ofN. grayana and the still uncertain relationships of the Brazilian and African populations, this third taxon is provisionally retained at the specific level pending further study of those populations.
Published Version
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