Lasthenia Asteraceae

The stndies of variation patterns in Lasthenia and Brickellia hardly break the snrface of a vast and complex literatnre on chemical variation within Asteraceae. The snbject has been discnssed in detail, with reviews focnsing on polyacetylenes (Bohlmann et al., 1973), sesqniterpene derivatives (Seaman, 1982), and flavonoids (Bohm and Stnessy, 2001). The next examples come from the sesqniterpene lactone literatnre and, again, represent only a sample of the applications that have been made nsing those data. Examples covering the taxonomic hierarchy within Asteraceae np to the early 1980s can be fonnd in the monumental review of the family prepared by Seaman (1982). 

Desrochers, A. M. 1992. A biosystematic study of Lasthenia californica (Asteraceae). Ph.D. Dissertation, University of British Columbia. 

Rainey, F. 1946. Quinine hunters in Ecuador. National Geographic Magazine 89 341-363. Rajakaruna, N., Siddiqui, M. Y., Whitton, J., Bohm, B. A. and Glass, A. D. M. 2003. Differential responses to Na+/K+ and Ca2+/Mg2+ in two edaphic races of Lasthenia californica (Asteraceae) complex A case for parallel evolution of physiological traits. New Phytol. 

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