Current Appointments & Affiliations
Professor Emeritus of Biology
·
2025 - Present
Biology,
Trinity College of Arts & Sciences
Associate of the Duke Initiative for Science & Society
·
2017 - Present
Duke Science & Society,
University Initiatives & Academic Support Units
Recent Publications
Corrigendum and Addendum to: “A phylogenetically informed generic reclassification of the hemionitid ferns (Pteridaceae: Cheilanthoideae)” [in Taxon 74: 260–291. 2025]
Journal Article TAXON · December 19, 2025 Full text CiteMicrosatellite, Hyb-Seq, and morphological studies confirm the enigmatic mustard Boechera tiehmii as an intergeneric hybrid.
Journal Article American journal of botany · December 2025 PremiseThe mustard genus Boechera (Brassicaceae) is notorious for rampant intra- and interclade hybridization, which has produced a complex reticulate network of apomictic diploid, triploid, and tetraploid hybrids. A recent hypothesis suggested th ... Full text CiteComparative phylogenetic analyses of RNA editing in fern plastomes suggest possible adaptive innovations.
Journal Article The New phytologist · September 2025 RNA editing in plant organelles is widely regarded as a neutral corrective mechanism, yet it persists as a complex, energetically costly process, requiring numerous nuclear-encoded pentatricopeptide repeat proteins. Ferns are the most diverse lineage of la ... Full text CiteRecent Grants
Digitization TCN: Collaborative Research: The Pteridological Collections Consortium: An integrative approach to pteridophyte diversity over the last 420 million years
ResearchCo-Principal Investigator · Awarded by University of North Carolina - Chapel Hill · 2018 - 2022DISSERTATION RESEARCH: Evolution and Function of Farina in the Desiccation-tolerant Notholaenid Ferns (Pteridaceae)
Inst. Training Prgm or CMEPrincipal Investigator · Awarded by National Science Foundation · 2017 - 2022Oceans Apart: Assessing the roles of Vicariance and Long-distance Dispersal in the Widely Disjunct Fern Genus Cheilanthes (Pteridaceae)
Inst. Training Prgm or CMEPrincipal Investigator · Awarded by National Geographic Society · 2019 - 2019View All Grants
Education, Training & Certifications
Duke University ·
1995
Ph.D.
University of Guelph (Canada) ·
1981
M.S.
McGill University (Canada) ·
1976
B.S.