William J. Hahn

3.2k total citations
32 papers, 1.5k citations indexed

About

William J. Hahn is a scholar working on Ecology, Evolution, Behavior and Systematics, Molecular Biology and Plant Science. According to data from OpenAlex, William J. Hahn has authored 32 papers receiving a total of 1.5k indexed citations (citations by other indexed papers that have themselves been cited), including 27 papers in Ecology, Evolution, Behavior and Systematics, 14 papers in Molecular Biology and 8 papers in Plant Science. Recurrent topics in William J. Hahn's work include Plant and animal studies (17 papers), Plant Diversity and Evolution (16 papers) and Plant and Fungal Species Descriptions (8 papers). William J. Hahn is often cited by papers focused on Plant and animal studies (17 papers), Plant Diversity and Evolution (16 papers) and Plant and Fungal Species Descriptions (8 papers). William J. Hahn collaborates with scholars based in United States, Canada and United Kingdom. William J. Hahn's co-authors include Kenneth J. Sytsma, Elizabeth A. Zimmer, W. John Kress, Linda M. Prince, Thomas J. Givnish, James F. Smith, Mark W. Chase, Sara B. Hoot, Daniel L. Nickrent and Jennifer A. Sweere and has published in prestigious journals such as Proceedings of the National Academy of Sciences, PLoS ONE and Evolution.

In The Last Decade

William J. Hahn

32 papers receiving 1.4k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
William J. Hahn United States 17 1.1k 752 478 221 184 32 1.5k
Conny B. Asmussen United Kingdom 10 910 0.8× 593 0.8× 419 0.9× 203 0.9× 128 0.7× 11 1.3k
Molly Nepokroeff United States 13 882 0.8× 630 0.8× 445 0.9× 177 0.8× 125 0.7× 14 1.2k
Jocelyn C. Hall Canada 23 985 0.9× 910 1.2× 863 1.8× 185 0.8× 164 0.9× 43 1.6k
Linda M. Prince United States 16 1.2k 1.1× 1.1k 1.5× 625 1.3× 158 0.7× 157 0.9× 29 2.0k
Philippe Küpfer Switzerland 22 1.2k 1.0× 899 1.2× 695 1.5× 288 1.3× 148 0.8× 33 1.6k
Yong–Ming Yuan Switzerland 21 1.0k 0.9× 1.1k 1.4× 604 1.3× 206 0.9× 85 0.5× 38 1.5k
Barbara G. Briggs Australia 19 1.6k 1.5× 1.0k 1.4× 821 1.7× 136 0.6× 242 1.3× 71 2.0k
Florian Jabbour France 23 911 0.8× 783 1.0× 534 1.1× 182 0.8× 140 0.8× 88 1.5k
Nyree J. C. Zerega United States 19 808 0.7× 750 1.0× 605 1.3× 363 1.6× 151 0.8× 46 1.6k
Ulf Swenson Sweden 28 1.6k 1.4× 1.0k 1.4× 619 1.3× 248 1.1× 247 1.3× 79 2.0k

Countries citing papers authored by William J. Hahn

Since Specialization
Citations

This map shows the geographic impact of William J. Hahn's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by William J. Hahn with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites William J. Hahn more than expected).

Fields of papers citing papers by William J. Hahn

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by William J. Hahn. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by William J. Hahn. The network helps show where William J. Hahn may publish in the future.

Co-authorship network of co-authors of William J. Hahn

This figure shows the co-authorship network connecting the top 25 collaborators of William J. Hahn. A scholar is included among the top collaborators of William J. Hahn based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with William J. Hahn. William J. Hahn is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Cardinal‐McTeague, Warren, et al.. (2013). Phylogenetic relationships among the North American cleomoids (Cleomaceae): A test of Iltis's reduction series. American Journal of Botany. 100(10). 2102–2111. 11 indexed citations
2.
Noblick, Larry R., William J. Hahn, & M. Patrick Griffith. (2013). Structural cladistic study of Cocoseae, subtribe Attaleinae (Arecaceae): Evaluating taxonomic limits in Attaleinae and the neotropical genus Syagrus. Brittonia. 65(2). 232–261. 8 indexed citations
3.
Meerow, Alan W., Larry R. Noblick, James W. Borrone, et al.. (2009). Phylogenetic Analysis of Seven WRKY Genes across the Palm Subtribe Attaleinae (Arecaceae) Identifies Syagrus as Sister Group of the Coconut. PLoS ONE. 4(10). e7353–e7353. 65 indexed citations
4.
Pastorini, Jennifer, et al.. (2009). Phylogeography of the Malagasy ring-tailed mongoose,Galidia elegans, from mtDNA sequence analysis. Mitochondrial DNA. 20(1). 7–14. 6 indexed citations
5.
Cibrián‐Jaramillo, Angélica, Christine D. Bacon, Nancy C. Garwood, et al.. (2009). Population genetics of the understory fishtail palm Chamaedorea ernesti-augusti in Belize: high genetic connectivity with local differentiation. BMC Genetics. 10(1). 65–65. 20 indexed citations
6.
Meerow, Alan W., Larry R. Noblick, James W. Borrone, et al.. (2009). Correction: Phylogenetic Analysis of Seven WRKY Genes across the Palm Subtribe Attaleinae (Arecaceae) Identifies Syagrus as Sister Group of the Coconut. PLoS ONE. 4(10). 14 indexed citations
7.
Cibrián‐Jaramillo, Angélica, William J. Hahn, & Rob DeSalle. (2007). PERMANENT GENETIC RESOURCES: Development of microsatellite markers of the Mexican understorey palm Chamaedorea elegans, cross‐species genotyping, and amplification in congeners. Molecular Ecology Resources. 8(2). 322–324. 4 indexed citations
8.
Givnish, Thomas J., Chris Pires, Sean W. Graham, et al.. (2006). Phylogenetic Relationships of Monocots Based on the Highly Informative Plastid Gene ndhF. Aliso. 22(1). 28–51. 85 indexed citations
9.
Evans, Margaret E. K., et al.. (2005). CLIMATE AND LIFE-HISTORY EVOLUTION IN EVENING PRIMROSES (OENOTHERA, ONAGRACEAE): A PHYLOGENETIC COMPARATIVE ANALYSIS. Evolution. 59(9). 1914–1914. 6 indexed citations
10.
Berry, Paul E., et al.. (2004). Phylogenetic relationships and biogeography of Fuchsia (Onagraceae) based on noncoding nuclear and chloroplast DNA data. American Journal of Botany. 91(4). 601–614. 94 indexed citations
11.
Hahn, William J.. (2002). A Molecular Phylogenetic Study of the Palmae (Arecaceae) Based on atpB, rbcL, and 18S nrDNA Sequences. Systematic Biology. 51(1). 92–112. 68 indexed citations
12.
Hahn, William J.. (2002). A phylogenetic analysis of the Arecoid Line of palms based on plastid DNA sequence data. Molecular Phylogenetics and Evolution. 23(2). 189–204. 60 indexed citations
13.
Kress, W. John, Linda M. Prince, William J. Hahn, & Elizabeth A. Zimmer. (2001). Unraveling the Evolutionary Radiation of the Families of the Zingiberales Using Morphological and Molecular Evidence. Systematic Biology. 50(6). 926–944. 132 indexed citations
14.
Fay, Michael F., P. J. Rudall, Stuart Sullivan, et al.. (2000). Phylogenetic studies of Asparagales based on four plastid DNA regions. Adelaide Research & Scholarship (AR&S) (University of Adelaide). 49 indexed citations
15.
Hahn, William J. & Kenneth J. Sytsma. (1999). Molecular Systematics and Biogeography of the Southeast Asian Genus Caryota (Palmae). Systematic Botany. 24(4). 558–558. 15 indexed citations
16.
Soltis, Pamela S., Daniel L. Nickrent, Leigh A. Johnson, et al.. (1997). Angiosperm Phylogeny Inferred from 18S Ribosomal DNA Sequences. Annals of the Missouri Botanical Garden. 84(1). 1–1. 358 indexed citations
17.
Hahn, William J.. (1996). Notes on Costa Rican Aquifoliaceae. Novon A Journal for Botanical Nomenclature. 6(2). 181–181. 3 indexed citations
18.
Hahn, William J., et al.. (1996). The Conservation of Plant Biodiversity.. Bulletin of the Torrey Botanical Club. 123(3). 251–251. 26 indexed citations
19.
Sytsma, Kenneth J., Thomas J. Givnish, James F. Smith, & William J. Hahn. (1993). [2] Collection and storage of land plant samples for macromolecular comparisons. Methods in enzymology on CD-ROM/Methods in enzymology. 224. 23–37. 25 indexed citations
20.
Hahn, William J.. (1993). A Synopsis of the Panamanian Species of Ilex (Aquifoliaceae). Novon A Journal for Botanical Nomenclature. 3(1). 34–34. 4 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Conny B. Asmussen Breakdown of academic impact, for papers by Molly Nepokroeff Breakdown of academic impact, for papers by Jocelyn C. Hall Breakdown of academic impact, for papers by Linda M. Prince Breakdown of academic impact, for papers by Philippe Küpfer Breakdown of academic impact, for papers by Yong–Ming Yuan Breakdown of academic impact, for papers by Barbara G. Briggs Breakdown of academic impact, for papers by Florian Jabbour Breakdown of academic impact, for papers by Nyree J. C. Zerega Breakdown of academic impact, for papers by Ulf Swenson
Rankless by CCL
2026