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On the evolutionary origins of the cacti
Understanding evolutionary responses of plants to desert environments depends upon phylogenetic knowledge of desert plants. The diverse American desert family Cactaceae has been presumed, on the… Expand
Conservation patterns in angiosperm rDNA ITS2 sequences.
The two internal transcribed spacers (ITS1 and ITS2) of nuclear ribosomal DNA have become commonly exploited sources of informative variation for interspecific-/intergeneric-level phylogenetic… Expand
Ribosomal DNA Sequences and Angiosperm Systematics
Revised circumscriptions and subgeneric taxonomies of Calandrinia and Montiopsis (Portulacaceae) with notes on phylogeny of the portulacaceous alliance
- M. Hershkovitz
Cladistic analysis of Portulacaceae supports a revised taxonomy of Calandrinia sensu lato. Calandrinia, as here circumscribed, comprises ca. 14 western American species in three sections:… Expand
Deep-level diagnostic value of the rDNA-ITS region.
The similarity of certain reported angiosperm rDNA internal transcribed spacer (ITS) region sequences to those of green algae prompted our analysis of the deep-level phylogenetic signal in the highly… Expand
Ancestral reconstruction of flower morphology and pollination systems in Schizanthus (Solanaceae).
- F. Pérez, M. K. Arroyo, R. Medel, M. Hershkovitz
- Biology, Medicine
- American journal of botany
- 1 July 2006
Concerted changes in flower morphology and pollinators provide strong evidence on adaptive evolution. Schizanthus (Solanaceae) has zygomorphic flowers and consists of 12 species of annual or biennial… Expand
Ribosomal DNA evidence and disjunctions of western American Portulacaceae.
Phylogenetic analysis of ribosomal DNA internal transcribed spacer sequences from 35 members of western American Portulacaceae plus seven Portulacaceae outgroups generally supports morphologically… Expand
Ribosomal and chloroplast DNA evidence for diversification of western American Portulacaceae in the Andean region
- M. Hershkovitz
Sequences of the ribosomal DNA internal transcribed spacer (ITS) region and the chloroplast DNA ycf3-trnS intergenic spacer were determined for 183 samples representing Chilean and non-Chilean taxa… Expand