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Phylogeny of a Neotropical Clade in the Gesneriaceae: More Tales of Convergent Evolution (with John L. Clark, Minde M. Funke, and Aaron M. Duffy), International Journal of Plant Sciences (2012)
The Gesneriaceae is a family known for convergent evolution of complex floral forms. As a...
A Systematic Revision of the Genus Manekia (Piperaceae) (with Heather K. Schubert, Michael S. Taylor, and Allan J. Bornstein), Systematic Botany (2012)
A systematic revision of the six nominal species of the Neotropical genus Manekia (Piperaceae) was...
The Extraordinary Journey of Peperomia Subgenus Tildenia (Piperaceae): Insights into Diversification and Colonization Patterns from its Cradle in Peru to the Trans-Mexican Volcanic Belt, Journal of Biogeography (2011)
Aim Peperomia subgenus Tildenia consists of c. 60 species growing in seasonal habitats of Neotropical...
Columnea Pygmaea (Gesneriaceae), a New Species from Northwestern Ecuador (with John L. Clark), Journal of the Botanical Research Institute of Texas (2011)
Recent expeditions to the northwestern slopes of the Ecuadorian Andes and revisionary work of Columnea...
A New Species in the Lomatium foeniculaceum (Apiaceae) Clade Revealed Through Combined Morphometric and Phylogenetic Analyses (with Kimberly M. Carlson and Donald H. Mansfield), Systematic Botany (2011)
A high degree of morphological variability exists within Lomatium (biscuitroots, Apiaceae). This variability has led...
New World Origins of Southwest Pacific Gesneriaceae: Multiple Movements Across and Within the South Pacific (with Vincent L. Woo, Minde M. Funke, Peter J. Lockhart, and Philip J. Garnock-Jones), International Journal of Plant Sciences (2011)
Coronanthereae is a tribe of ~20 species with a suite of unique morphological characters and...
Phylogenetic Reconstruction of Chirita and Allies (Gesneriaceae) with Taxonomic Treatments (with Yin-Zheng Wang, Ru-Bing Mao, Yan Liu, Jia-Mei Li, Yang Dong, and Zhen-Yu Li), Journal of Systematics and Evolution (2011)
Chirita D. Don, a large genus in the subfamily Cyrtandroideae of Gesneriaceae, has been the...
Species Boundaries in Pyrrocoma liatriformis and Pyrrocoma scaberula (Asteraceae) Based on AFLP Data (with Dusty N. Perkins, Curtis R. Björk, and Gina Glenne), Madroño (2010)
Previous investigations into the morphology of Pyrrocoma liatriformis sensu lato in northern Idaho and adjacent...
Phylogenetic Relationships Among Lepidium papilliferum (L. Henderson) A. Nels. & J. F. Macbr., L. montanum Nutt., and L. davisii Rollins (Brassicaceae) (with Amy J. Stillman, Steven R. Larson, C. Mae Culumber, Ian C. Robertson, and Stephen J. Novak), The Journal of the Torrey Botanical Club (2009)
Previous phylogenetic analyses of Lepidium included only a few accessions of L. montanum, L. flavum,...
Origin, Adaptive Radiation and Diversification of the Hawaiian Lobeliads (Asterales: Campanulaceae) (with Thomas J. Givnish, Kendra C. Millam, Austin R. Mast, Thomas B. Paterson, Terra J. Theim, Andrew L. Hipp, Jillian M. Henss, Kenneth R. Wood, and Kenneth J. Smytsma), Proceedings of the Royal Society B-Biological Sciences (2009)
The endemic Hawaiian lobeliads are exceptionally species rich and exhibit striking diversity in habitat, growth...
Familial Placement and Relations of Rehmannia and Triaenophora (Scrophulariaceae s.l.) Inferred From Five Gene Regions (with Zhi Xia and Yin-Zheng Wang), American Journal of Botany (2009)
Accurate classification systems based on evolution are imperative for biological investigations. The recent explosion of...
A Phylogeny of the Tropical Genus Piper Using ITS and the Chloroplast Intron psbJ-petA (with M. Alejandra Jaramillo, Ricardo Callejas, Christopher Davidson, Angela C. Stevens, and Eric J. Tepe), Systematic Botany (2008)
Piper is one of the largest genera of flowering plants. The uniformity of its small...
Molecules and Morphology in South American Stipeae (Poaceae) (with Mary E. Barkworth, Mirta O. Arriaga, Surrey W.L. Jacobs, Jesus Valdés-Reyna, and B. Shaun Bushman), Systematic Botany (2008)
We conducted phylogenetic analyses of molecular data (ITS, trnH-psbA, trnC-trnL, and trnK-rps16) for 71 species...
Placing the Origin of Two Species-Rich Genera in the Late Cretaceous with Later Species Divergence in the Tertiary: A Phylogenetic, Biogeographic and Molecular Dating Analysis of Piper and Peperomia (Piperaceae) (with Angela C. Stevens, Eric J. Tepe, and Chris Davidson), Biology Faculty Publications and Presentations (2008)
Nearly all of the species diversity in Piperaceae is encompassed within Piper and Peperomia. Both...
Placing the Origin of Two Species-Rich Genera in the Late Cretaceous with Later Species Divergence in the Tertiary: A Phylogenetic, Biogeographic and Molecular Dating Analysis of Piper and Peperomia (Piperaceae) (with Angela C. Stevens, Eric J. Tepe, and Chris Davidson), Biology Faculty Publications and Presentations (2008)
Nearly all of the species diversity in Piperaceae is encompassed within Piper and Peperomia. Both...
Placing the Origin of Two Species-Rich Genera in the Late Cretaceous with Later Species Divergence in the Tertiary: a Phylogenetic, Biogeographic and Molecular Dating Analysis of Piper and Peperomia (Piperaceae) (with Angela C. Stevens, Eric J. Tepe, and Chris Davidson), Plant Systematics & Evolution (2008)
Nearly all of the species diversity in Piperaceae is encompassed within Piper and Peperomia. Both...
Populations Composed Entirely of Hybrid Colonies: Bidirectional Hybridization and Polyandry in Harvester Ants (with Kirk E. Anderson and Stephen J. Novak), Biological Journal of the Linnean Society (2008)
In eusocial Hymenoptera, haplodiploid life cycles, obligate sterile castes, and polyandry may facilitate selection for...
Altered Expression Patterns of TCP and MYB Genes Relating to the Floral Developmental Transition from Initial Zygomorphy to Actinomorphy in Bournea (Gesneriaceae) (with Xiu-Ren Zhou, Yin-Zheng Wang, and Rujin Chen), New Phytologist (2008)
• The shift from zygomorphy to actinomorphy has been intensively studied in molecular genetic model...
Sex Identification in Four Owl Species From Idaho: DNA and Morphometrics (with Lynda Leppert, Tatiana V. Zadorozhyny, James R. Belthoff, Alfred M. Dufty, Sarah L. Stock, and Greg Kaltenecker), Journal of Raptor Research (2006)
Accurate sex identification is necessary for a broad spectrum of bird studies, including brood sex...
A Duplication of gcyc Predates Divergence Within Tribe Coronanthereae (Gesneriaceae): Phylogenetic Analysis and Evolution (with M. M. Funke and V. L. Woo), Plant Systematics and Evolution (2006)
Recent investigations in Gesneriaceae have indicated that the cycloidea homolog, gcyc, remains functional at the...
Evolution of Cyrtandra (Gesneriaceae) in the Pacific Ocean: The Origin of a Supertramp Clade (with Quentin C. B. Cronk, Michael Kiehn, and Warren L. Wagner), American Journal of Botany (2005)
Cyrtandra comprises at least 600 species distributed throughout Malesia, where it is known for many...
A Phylogenetic Analysis within Tribes Gloxinieae and Gesnerieae (Gesnerioideae: Gesneriaceae) (with Scottie B. Draper, Lena C. Hileman, and David A. Baum), Systematic Botany (2004)
The evolution of floral symmetry in Asteridae has been of recent interest. Three genera with...
Evolution of GCYC, a Gesneriaceae Homolog of CYCLOIDEA, Within Gesnerioideae (Gesneriaceae) (with Lena C. Hileman, Martyn P. Powell, and David A. Baum), Molecular Phylogenetics and Evolution (2004)
Through recent advances in molecular developmental biology it has become clear that similar morphological traits...
Genetic Differentiation of Rare and Common Varieties of Eriogonum Shockleyi (Polygonaceae) in Idaho Using ISSR Variability, Western North American Naturalist (2002)
Idaho populations of Eriogonum shockleyi are divided taxonomically into 2 varieties: E. shockleyi var. packardae...
High Species Diversity in Fleshy-Fruited Tropical Understory Plants, The American Naturalist (2001)
Key innovations may increase the number of taxa in a clade that possesses the proposed...
The Phylogenetic Relationships of Lembocarpus and Goyazia (Gesneriaceae) Based on ndhF Sequences, Annals of the Missouri Botanical Garden (2001)
The phylogenetic relationships of Goyazia and Lembocarpus are investigated based on cladistic analysis of ndhF...
Phylogenetic Signal Common to Three Data Sets: Combining Data Which Initially Appear Heterogeneous, Plant Systematics and Evolution (2000)
This study makes use of three sources of data, morphology and two chloroplast DNA sequences,ndhF...
Phylogenetic Resolution Within the Tribe Episcieae (Gesneriaceae): Congruence of ITS and ndhF Sequences from Parsimony and Maximum-Likelihood Analyses, American Journal of Botany (2000)
Generic relationships within Episcieae were assessed using ITS and ndhF sequences. Previous analyses of this...
A Phylogenetic Analysis of Tribes Beslerieae and Napeantheae (Gesneriaceae) and Evolution of Fruit Types: Parsimony and Maximum Likelihood Analyses of ndhF Sequences, Systematic Botany (2000)
A cladistic analysis of tribes Beslerieae and Napeantheae revealed that both are monophyletic groups and...
Una nueva especie de Columnea (Gesneriaceae) del Norte de los Andes Colombianos (with M. M. Amaya, L. E. Skog, and C. E. Gonzalez), Caldasia (2000)
Alloplectus martinianus, a New Species of Gesneriaceae from Ecuador, Novon (1999)
Alloplectus martinianus, a new species of Gesneriaceae from Ecuador, is described. The species is distinctive...
A Cladistic Analysis of ndhF Sequences from Representative Species of Saintpaulia and Streptocarpus Subgenera and Streptocarpella (Gesneriaceae) (with M. E. Kresge, M. Möller, and Q. C. B. Cronk), Edinburgh Journal of Botany (1998)
Two African genera of the Gesneriaceae, Saintpaulia and Streptocarpus, are similar in many respects. Both...
Phylogenetic Analysis of the Tribes Gloxinieae and Gesnerieae (Gesneriaceae): Data from ndhF Sequences (with S. Atkinson), Selbyana (1998)
A Cladistic Analysis of the Tribe Episcieae (Gesneriaceae) Based on ndhF Sequences: Origin of Morphological Characters (with Cynthia L. Carroll), Systematic Botany (1997)
The neotropical members of Gesneriaceae are characterized by numerous characters that appear to be adaptations...
Familial Placement of Cyrtandromoea, Titanotrichum and Sanango, Three Problematic Genera of the Lamiales (with K. D. Brown, C. L. Carroll, and D. S. Denton), Taxon (1997)
Cladistic relationships among Gesneriaceae and related families are investigated using ndhF sequence data, to establish...
Molecular Evolution and Adaptive Radiation in Brocchinia (Bromeliaceae: Pitcairnioideae) Atop Tepuis of the Guayana Shield, Molecular Evolution and Adaptive Radiation (1997)
Tribal Relationships in the Gesneriaceae: Evidence from DNA Sequences of the Chloroplast Gene ndhF (with J. C. Wolfram, K. D. Brown, C. L. Carroll, and D. S. Denton), Annals of the Missouri Botanical Garden (1997)
The tribal relationships of the Gesneriaceae are investigated using ndhF sequences. A full analysis of...
Tribal Relationships Within Gesneriaceae: A Cladistic Analysis of Morphological Data, Systematic Botany (1996)
This paper investigates cladistic relationships among tribes of Gesneriaceae using morphological data. Forty-four characters were...
Genetic Diversity of the Narrow Endemic Allium Aaseae (Alliaceae) (with T. Vuong Pham), American Journal of Botany (1996)
Low levels of genetic variability are common for a number of geographically restricted plants: these...
Interspecific Hybridization in Natural Populations of Cyrtandra (Gesneriaceae) on the Hawaiian Islands: Evidence from RAPD Markers (with Charles C. Burke and Warren L. Wagner), Plant Systematics and Evolution (1996)
Interspecific hybridization among Hawaiian species ofCyrtandra (Gesneriaceae) was investigated using randomly amplified polymorphic DNA (RAPD)...
Interspecific Hybridization in Natural Populations of Cyrtandra (Gesneriaceae) on the Hawaiian Islands: Evidence from RAPD Markers (with Charles C. Burke and Warren L. Wagner), Plant Systematics and Evolution (1996)
Interspecific hybridization among Hawaiian species ofCyrtandra (Gesneriaceae) was investigated using randomly amplified polymorphic DNA (RAPD)...
Interspecific Hybridization in Natural Populations of Cyrtandra (Gesneriaceae) on the Hawaiian Islands: Evidence from RAPD Markers (with Charles C. Burke and Warren L. Wagner), Biology Faculty Publications and Presentations (1996)
Interspecific hybridization among Hawaiian species of Cyrtandra (Gesneriaceae) was investigated using randomly amplified polymorphic DNA...
A Cladistic Analysis of Chloroplast DNA Restriction Site Variation and Morphology for the Genera of the Juglandaceae (with Jeff J. Doyle), American Journal of Botany (1995)
The phylogenetic relationships of the genera of the Juglandaceae are examined with cladistic analyses of...
A Cladistic Analysis of Chloroplast DNA Restriction Site Variation and Morphology for the Genera of the Juglandaceae (with Jeff J. Doyle), Biology Faculty Publications and Presentations (1995)
The phylogenetic relationships of the genera of the Juglandaceae are examined with cladistic analyses of...
Molecular Evolution, Adaptive Radiation, and Geographic Speciation in Cyanea (Campanulaceae, Lobelioideae), Hawaiian Biogeography: Evolution on a Hot Spot Archipelago (1995)
Evolution in the Andean Epiphytic Genus Columnea (Gesneriaceae). II. Chloroplast DNA Restriction Site Variation (with Kenneth J. Sytsma), Systematic Botany (1994)
A cladistic analysis of chloroplast DNA (cpDNA) restriction site variation was performed on Columnea (Gesneriaceae)...
Evolution in the Andean Epiphytic Genus Columnea (Gesneriaceae). I. Morphological Variation (with Kenneth J. Sytsma), Systematic Botany (1994)
A cladistic analysis was performed on morphological data from seven of the nine species of...
Thorn-Like Prickles and Heterophylly in Cyanea: Adaptations to Extinct Avian Browsers on Hawaii? (with T. J. Givnish, K. J. Sytsma, and W. J. Hahn), Proceedings of the National Academy of Sciences of the United States of America (1994)
The evolution of thorn-like structures in plants on oceanic islands that lack mammalian and reptilian...
Molecules and Morphology: Congruence of Data in Columnea (Gesneriaceae) (with Kenneth J. Sytsma), Plant Systematics and Evolution (1994)
The cladistic analysis and comparison of molecular and morphological data has been the source of...
Molecules and Morphology: Congruence of Data in Columnea (Gesneriaceae) (with Kenneth J. Sytsma), Biology Faculty Publications and Presentations (1994)
The cladistic analysis and comparison of molecular and morphological data has been the source of...
Systematics of Columnea Sections Pentadenia and Stygnanthe (Gesneriaceae), Systematic Botany Monographs (1994)
The 27 species of Columnea (Gesneriaceae) here described are assigned to sections Pentadenia and Stygnanthe....
Novae Gesneriaceae Neotropicarum V. Four New Species and Two New Combinations in Columnea from South America (with Laurence E. Skog), Novon (1993)
A monographic study of sections Pentadenia and Stygnanthe of Columnea (Gesneriaceae) has revealed four species...
A Floristic Survey of Benedict Prairie (Kenosha County, WI) (with M. A. Kuchenreuther), Field Station Bulletin (1993)
Obtaining and Storing Land Plant Samples for Macromolecular Comparisons (with K. J. Sytsma, T. J. Givnish, and W. J. Hahn), Molecular Evolution: Producing the Biochemical Data (1993)
Phylogenetic Analysis of the Zingiberales Based on rbcL Sequences (with W. John Kress and Elizabeth A. Zimmer), Annals of the Missouri Botanical Garden (1993)
Morphological data have been used previously to construct phylogenies of the eight families of the...
Phylogenetic Hypotheses for the Monocotyledons Constructed from rbcL Sequence Data, Annals of the Missouri Botanical Garden (1993)
DNA sequences for the plastid locus that encodes the large subunit if ribulose 1.5 bisphosphate...
Phylogenetics of Seed Plants: An Analysis of Nucleotide Sequences from the Plastid Gene rbcL, Annals of the Missouri Botanical Garden (1993)
We present the results of two exploratory parsimony analyses of DNA sequences from 475 and...
A Qualitative Comparison of Total Cellular DNA Extraction Protocols (with K. J. Sytsma, J. S. Shoemaker, and R. L. Smith), Phytochemical Bulletin (1992)
Molecular Systematics of Onagraceae: Examples from Clarkia and Fuchsia (with Kenneth J. Sytsma), Molecular Systematics of Plants (1992)
The Use of Chloroplast DNA to Assess Biogeography and Evolution of Morphology, Breeding Systems, and Flavonoids in Fuchsia Sect, Skinnera (Onagraceae) (with Kenneth J. Sytsma and Paul E. Berry), Systematic Botany (1991)
A Molecular Reexamination of Diploid Hybrid Speciation of Solanum Raphanifolium (with David M. Spooner and Kenneth J. Sytsma), Evolution (1991)
Phylogenetics in Clarkia (Onagraceae): Restriction Site Mapping of Chloroplast DNA (with Kenneth J. Sytsma and L. D. Gottlieb), Systematic Botany (1990)
Restriction site maps of chloroplast DNA (cpDNA), maternally inherited in Clarkia, were obtained in representative...
DNA and Morphology: Comparisons in the Onagraceae (with Kenneth J. Sytsma), Annals of the Missouri Botanical Garden (1988)
Comparisons of systematic information generated from both classical systematic approaches and from DNA analysis at...