César A.N. Catalán

TL;DR: The ontogeny of the tuberous roots of yacon (Smallanthus sonchifolius), an ancient Andean crop, is described for the first time along with three other wild species of Smallanthus and develops a parenchymatous pith that stores mainly fructooligosacharides and plays an important role in storing water, protecting the plant from drought stress and environmental hazards in the Andean climate.

TL;DR: Flowers and leaves of Disynaphia multicrenulata from Argentina afforded a large number of known germacradienolides and heliangolides, a new germac radienolide and a new parthenolide derivative, and one known and seven new cronquistiolides.

TL;DR: Bark of Polylepis australis furnished a complex mixture of triterpene acids from which, after methylation, the methyl esters of five known and two new oleananes and five known ursanes were isolated.

TL;DR: The chemistry of the subtribe Gochnatiinae is reviewed and some taxonomic implications are discussed.

TL;DR: The volatile oil of Zanthoxylum rhetsa, D.C. has been analyzed by a combination of gas chromatography and a mass spectrometer as discussed by the authors.