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Abstract The wax on the stems and leaves of Larrea divaricata contains a mixture of even carbon-numbered alkyl esters (C48-C56) consisting of fatty acids (C22-C32) and primary alcohols (C24-C30).
The taxonomic placement of Hulsea is discussed in light of the distribution of pyrrolizidine alkaloids, sesquiterpene lactones, and polyacetylenic compounds in the Asteraceae.