Chemosystematic Notes on the Asteraceae I New Correlations in Subtribes of the Heliantheae H. Robinson^, F. Bohlmann^ and R. M. Kingl Abstract Among the Heliantheae with paleaceous receptacles, Polyacetylenes of the dehydrof al -carinone type containing a ketone unit are correlated with the redelimited subtribes Helianthinae containing Lagasoea and the Galinsoginae containing Alloispermum. The Neurolaeninae containing Calea lack such poly-acetylenes but contain thymol derivatives. Coulterella with a thiophene type of polyacety-lene and thymol derivatives is placed in a subtribe Coulterellinae near the epaleaceous subtribes Pectidinae and Flaveriinae. Chemosystematics has enjoyed some important success in the tribe Heliantheae. In the sesquiterpene lactones Herz (1977) has shown that the Ambrosanolides are essentially restricted to the subtribe Ambrosiinae and the Helenolides are almost completely restricted to the subtribe Gaillardiinae. One group of polyacety-lenes, the epoxysulfones are found only in the Gaillardiinae CBohlmann, 1973; Swain ^ Williams, 1977). The correlations were possible because of the conparatively accurate concepts of the subtribes in the traditional classifications. Chaotic concepts of other subtribes in the Heliantheae has prevented meaningful interpretation of other chemical data, however. The recent revisions of the tribes Heliantheae (Stuessy, 1977) and Helenieae (Turner § Powell, 1977) for the Reading Synposium provide a number of changes. The most significant was the reduction of the artificial subtribe Lagasceinae which had contained two genera, Lagasoea and Coulterella having single-flowered heads. Unfortunately Stuessy' s placement of Lagasoea in the Verbesininae was already superceded by the time of publication by his correct though perhaps inadvertent placement of the genus ^Department of Botany, Smithsonian Institution Washington, D.C. 20560 USA ^Institute of Organic Chemistry, Technical University D-1000 Berlin W. Germany 50
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