Abstract
Martinez, S.; C. I. Calvino & G. Delucchi. 2012. Oenanthe crocata(Apiaceae, Apioideae), new toxic plant for the adventive flora of Argentina and America. Darwiniana50(1): 97-106.. The presence of Oenanthe crocata in Buenos Aires province adds a new species to the adventive flora of Argentina and America. This is a toxic plant native from Europe; its toxicity is due to the pre- sence, particularly in roots, of oenanthotoxin, a polyacetylenic alcohol. In its countries of origin, cases of poisoning and death of cattle and humans have been reported by the ingestion of the radical tuber- cles. The identification of the species was corroborated by comparing the nrDNA ITS region of the argentine material to all the nucleotide sequences available at GenBank, and by performing a maxi- mum likelihood phylogenetic analysis of Oenanthespecies. Moreover, Oenanthe divaricatais referred to the synonymy of O. crocata for the first time. This contribution describes and illustrates this new record, provides a distribution map and points the differential characters with other apioids that grow in Argentina.
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