“…Here, we have used a portion of the nuclear plastid-expressed glutamine synthetase gene (ncpGS, introns 7-10), as well as four plastid intergenic spacers (trnT-trnL, trnL-trnF, trnS-trnG, atpB-rbcL) and two introns (within trnL and rpl16) to produce a nearly complete species-level phylogenetic tree for the members of Sinningieae. We sampled all known species (Wiehler, 1983(Wiehler, , 1984Chautems, 1990Chautems, , 1991Chautems, , 1995Chautems and Weber, 1999;Chautems et al, 2000) with the excep-[Vol. 90 AMERICAN JOURNAL OF BOTANY tion of six taxa for which we could not obtain suitable material (i.e., S. helleri, S. schomburkiana, S. sulcata, and three unpublished new species).…”