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This work describes the first phylogenetic analysis of the entire Asteraceae based only on chemical data. The data matrix used in this study was based on a large chemical database comprising ~400 skeletal types of terpenes, coumarins, flavonoids, benzofurans and polyacetylenes isolated from the family. Hypotheses about the relationships among tribes are discussed based on the chemical data and compared with relationships inferred from the morphological and macromolecular based classifications.

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The current review outlines the distribution of flavonoids and phenolic acids in eleven species of Silphium (Asteraceae). The chemosystematic significance of these findings is discussed and compared with DNA and morphological-based assignments for eleven species. Special attention is given to the five flavonol triglycosides that were previously isolated and characterized from Silphium species:

We investigated macrolichen diversity on Quercus garryana at ten sites in the Puget Trough and Columbia River Gorge areas of Washington. The known ranges of some oak-associated species are expanded within Washington and occurrences of several species new to the state are reported. We identified 111 lichen taxa, 80 of which occurred at more than one site and three species, Fuscopannaria pulveracea, Placidium fingens and Collema quadrifidum, which are reported for the first time for Washington. We report four additional species, Bryoria furcellata, Dendriscocaulon intricatulum, Usnea cavernosa and Waynea californica, which are reported from oaks on two or fewer sites in Washington prior to this study. We compiled records from herbaria and other Washington oak lichen studies to evaluate the rarity of observed species and potentially rare species known from nearby locations. Using macrolichens we developed an Index of Ecological Continuity for oak habitats in Washington to help land managers assess the health of the lichen communities on oaks. We also recorded lichen species diversity and abundance in air quality monitoring plots at six of our sites in order to assess the threat level from 2