| Name | Country (Main) | Phone and Extension-Phone (Main) | Phone and Extension-Fax (Main) | Email (Main) | Research Interests | |
|---|
| PENNEYS, DARIN | United States | 910.962.3046 | | dpenneys@yahoo.com | Phylogenetics of the Melastomataceae. SE USA flora. Philippines flora. | View |
| Pesant, Simon | Canada | | | simon.pesant.2@umontreal.ca | Taxonomy, Floristics, Wetlands, Endemism | View |
| PETERSON, PAUL M. | United States | 202-633-0975 | | peterson@si.edu | Poaceae | View |
| Phelan, Nicole | United States | | | nicole.phelan@uvm.edu | | View |
| Piniely, Luciana | United States | 7735160959 | | lucianapiniely2026@u.northwestern.edu | Plant taxonomy, genomics, genetics and evolution | View |
| Pinto, Esteban | United States | 7062892503 | | estebanpinto1284@gmail.com | Plant systematics, plant ecology, plant phylogenies, forest and carbon dynamics | View |
| Piovesani, Willian | Brazil | +5551986394371 | | willianpiovesani@hotmail.com | Angiosperms, Taxonomy | View |
| Pipkin, Peri Lee | United States | 9148863679 | | peri.lee@gmail.com | Floristics, Rare plants, Plant conservation, Alpine botany, Desert botany, Global change ecology, Edaphic endemism | View |
| Plume, Olofron | | | | op32@cornell.edu | plant systematics, evolution of polyploidy and chemistry in plants | View |
| PLUNKETT, GREGORY M. | United States | 718-817-8179 | | gplunkett@nybg.org | Taxonomy and molecular systematics of Apiaceae; Araliaceae; Pittosporaceae; Pacific floristics and biogeography. | View |
| POTTER, DANIEL | United States | 530-754-6141 | | dpotter@ucdavis.edu | | View |
| POWELL, A. MICHAEL | United States | 432-837-8366 | | ampowell@sulross.edu | Systematics; flora of northern Chihuahuan Desert region. | View |
| POZNER, RAUL | Argentina | +54-11-4743-4800 | | rpozner@darwin.edu.ar | Systematics & taxonomy of Cucurbitaceae & Calyceraceae. | View |
| PRANCE, SIR GHILLEAN T. | United Kingdom | +44-1297-444-991 | | siriain01@yahoo.co.uk | Chrysobalanaceae; Lecythidaceae; Amazonian flora, Proteaceae; Rhizophoraceae. | View |
| PRATHER, ALAN | United States | 517-355-4695 | | alan@msu.edu | Systematics of Polemoniaceae; Lamiaceae; Phlox, Monarda; polyploidy | View |
| PRICE, MICHELLE J. | Switzerland | +41-0-22-418-5148 | +41-0-22-418-5101 | michelle.price@ville-ge.ch | Mosses; moss systematics; Dicranaceae. | View |
| PRICE, ROBERT A. | United States | 916-662-5917 | | robert.price@cdfa.ca.gov | Systematics of Brassicaceae; evolution of conifers. | View |
| PRYER, KATHLEEN M. | United States | 919-660-7380 | 919-660-7380 | pryer@duke.edu | Phylogenetics of early land plants, especially ferns & horsetails; Marsileaceae; Salviniaceae; morphology, molecules, fossil evidence. | View |
| Quinellato Dantas, Pedro | Brazil | +55 19 996263424 | | pedroqdantas@gmail.com | Plant Systematics, Phylogenetics, Plant taxonomy, Floristics, Floral Biology, Pollination Ecology, Nomenclature | View |
| Radtke, Tyler | | | | t.radtke@ufl.edu | | View |
| Ramm, Zacc | United States | 2516561033 | | ztr1921@jagmail.southalabama.edu | | View |
| Rana, Santosh | United States | 8143084069 | | sranamagar@astate.edu | Biodiversity, Bioinformatics, Climate adaptation, Molecular taxonomy, Plant Systematics, Population genetics | View |
| RANKER, TOM A. | United States | 808-489-2832 | | tom.ranker@gmail.com | Systematics, Island Biogeography and Biodiversity, Floristics, Ferns & Lycophytes | View |
| RASMUSSEN, FINN NYGAARD | Denmark | +45-22 61 10 62 | | fnr@mail.dk | Orchidaceae, Monocot systematics, Mycorrhiza, Amber fossils | View |
| RAVEN, PETER H. | United States | 314-577-9577 | 314-577-9596 | peter.raven@mobot.org | Plant geography; Onagraceae. | View |
| Raynor, Seth | United States | | | seth.raynor@colorado.edu | Lichens, Plants, Taxonomy, Biogeography, Natural History | View |
| Redonda-Martinez, Rosario | Mexico | 52 434 117 95 22 | | | Taxonomy, Micromorphology, Systematics, Asteraceae | View |
| Reinoso, Camille | | | | camillereinoso2025@u.northwestern.edu | | View |
| REZNICEK, ANTON (TONY) A. | United States | 734-764-5544; 734-996-0692 | | reznicek@umich.edu | Systematics of Cyperaceae; Floristics, Biogeography, and Botanical History of the Great Lakes Region | View |
| RIGGINS, CHANCE W. | United States | 217-300-0563 | | cwriggin@illinois.edu | Artemisia (Asteraceae); Amaranthus (Amaranthaceae); Acacia (Fabaceae); Crop Evolution; Crop Wild Relatives; Phytochemistry | View |
| RIGGINS, RHONDA | United States | 805-544-6595 | | rhorigg@charter.net | Lupinus (Fabaceae). | View |
| Rincon Pinilla, Gabriela | Canada | | | gabriela.rinconpinilla@uqar.ca | Conservation genetics, population genetics, ecology, DNA barcoding, molecular biology, evolution, botany, willows and ornithology | View |
| ROALSON, ERIC H. | United States | 509-335-7921 | | eric_roalson@wsu.edu | Cyperaceae; Gesneriaceae; Cleomaceae; C4 evolution. | View |
| ROBINSON, HAROLD E. | United States | 202-633-0955 | 202-786-2563 | robinsoh@si.edu | Bryology; Asteraceae. | View |
| RODMAN, JAMES E. | United States | 360-307-7033 | | rodman69_890@msn.com | Brassicaceae; chemosystematics; phylogenetics; plant-insect co-evolution. | View |
| Rohrer, Joseph | United States | 715-835-0560 | | jrohrer@uwec.edu | | View |
| Roman, Maria | United States | 3057098294 | | mromanayo@gmail.com | | View |
| Romero, Fabian | United States | 352-273-1960 | | fromerosoto@ufl.edu | Plant Taxonomy, Botany, Systematics, Biogeography, Ecology, Riparian Forests, Dioscorea, Phylogeography | View |
| ROMERO, ROSANA | Brazil | 34999501899 | | rosana.romero@ufu.br | Melastomataceae, floristic | View |
| Rossetto, Felipe | Brazil | | | rossetto.felipe@gmail.com | taxonomy; Nyctaginaceae | View |
| ROTHFELS, CARL | United States | | | carl.rothfels@usu.edu | phylogenetics, ferns, lycophytes, polyploidy, reticulate evolution | View |
| ROTHWELL, GAR W. | United States | 541 737-5252 | | rothwell@ohio.edu | Plant structure and development, Paleobotany, Land plant phylogeny. | View |
| RUDALL, PAULA | United Kingdom | 020-8332-5331 | 020-8332-5310 | p.rudall@kew.org | | View |
| RUHFEL, BRAD | United States | 734-615-6404 | | ruhfel@umich.edu | Phylogenetics; green plants; clusioids; Herbaria; Podostemaceae | View |
| RUIZ SANCHEZ, EDUARDO | Mexico | +52 443 224 8137 | | ruizsanchez.eduardo@gmail.com | Systematics; phylogenetics of American bamboos; phylogeography of Mexican endemic plants. | View |
| Ruiz Vargas, Natalia | Canada | | | nruizv@gmail.com | | View |
| RZEDOWSKI, JERZY | Mexico | +52-434-342-26-98 | +52-434-342-26-99 | jerzedowski@gmail.com | Floristics & plant geography of Mexico; taxonomy of Bursera (Burseraceae). | View |
| S B, Rhuthuparna | India | 08848239214 | | rhuthuparna20@iiserb.ac.in | Pollination biology, evolutionary ecology | View |
| Saavedra Sáenz, Carolina | Brazil | +5561996768845 | | ycsaavedras@unal.edu.co | | View |
| SAKAI, ANN K. | United States | | 949 824 2181 | aksakai@uci.edu | Plant breeding systems, conservation biology, evolutionary ecology, systematics of Schiedea (Caryophyllaceae) | View |
