New flavonoids from Flourensia cernua . New or noteworthy Asteraceae from Panama.
Chromosome reports for Asteraceae.
Chromosome reports for Krameriaceae and Solanaceae. Chromosome Numbers of Peruvian Compositae. Four New Species of Asteraceae from Peru. Sesquiterpene Lactones from Helogyne hutchisonii . Helogynic acid, a homoditerpene, and other constituents from Helogyne apaloidea .