R. Olmstead

Publications195
h-index67
Citations16,697
Highly Influential Citations1,102
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Disintegration of the scrophulariaceae.
TLDR
A molecular systematic study of Scrophulariaceae sensu lato using DNA sequences of three plastid genes revealed at least five distinct monophyletic groups, which are newly erected herein to recognize the phylogenetic distinctiveness of tribe Calceolarieae. Expand
A molecular phylogeny of the Solanaceae
TLDR
The current results corroborate previous studies that identify a monophyletic subfamily Solanoideae and the more inclusive "x = 12" clade, which includes Nicotiana and the Australian tribe Anthocercideae, and provide greater resolution among lineages within Solanoidesae. Expand
A phylogenetic framework for evolutionary study of the nightshades (Solanaceae): a dated 1000-tip tree
TLDR
The authors' large time-calibrated phylogeny provides a significant step towards completing a fully sampled species-level phylogeny for Solanaceae, and provides age estimates for the whole family, and is one of the best sampled angiosperm family phylogenies both in terms of taxon sampling and resolution published thus far. Expand
Phylogenetics of asterids based on 3 coding and 3 non-coding chloroplast DNA markers and the utility of non-coding DNA at higher taxonomic levels.
TLDR
The analysis has contributed to reclassification of several families, e.g., Tetrameristaceae, Ebenaceae, Styracaceae, Montiniaceae, Orobanchaceae, and Scrophulariaceae (by inclusion of Pellicieraceae, Lissocarpaceae, Halesiaceae, Kaliphoraceae, Cyclocheilaceae, respectively), and to the placement of families that were unplaced in the APG-system. Expand
An ordinal classification for the families of flowering plants
Recent cladistic analyses are revealing the phylogeny of flowering plants in increasing detail, and there is support for the monophyly of many major groups above the family level. With many elements… Expand
The Selaginella Genome Identifies Genetic Changes Associated with the Evolution of Vascular Plants
TLDR
The genome sequence of the lycophyte Selaginella moellendorffii (Selaginella), the first nonseed vascular plant genome reported, is reported, finding that the transition from a gametophytes- to a sporophyte-dominated life cycle required far fewer new genes than the Transition from a non Seed vascular to a flowering plant. Expand
Phylogenetic relationships in Nicotiana (Solanaceae) inferred from multiple plastid DNA regions.
TLDR
Parsimony and Bayesian analyses yielded identical relationships for the diploids, and these are consistent with other data, producing the best-supported phylogenetic assessment currently available for the genus Nicotiana. Expand
Combining Data in Phylogenetic Systematics: An Empirical Approach Using Three Molecular Data Sets in the Solanaceae
TLDR
Data from sequences of two chloroplast DNA genes, ndhV and rbcL, and from restriction site mapping studies of the entire chloroplane genome were analyzed for the same set of 17 species of Solanaceae and the outgroup Ipomoea, finding the "X = 12" dade is the most well-supported dade within the family. Expand
Phylogenetic relationships of Dipsacales based on rbcl sequences
TLDR
The genera of Caprifoliaceae do not form a monophyletic group and Symphoricarpos and Lonicera are related and are united with Valerianaceae and Dipsacaceae; Adoxa and Sambucus are directly linked and are possibly related to Viburnum. Expand
Further disintegration of Scrophulariaceae
TLDR
A novel, strongly supported, clade of taxa earlier assigned to Scrophulariaceae was found and possibly represents the tribe Lindernieae, diagnosed by geniculate anterior filaments, usually with a basal swelling. Expand
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