James Richardson

Email: James Richardson

Phone: +44 (0)131 248 2927

Fax: +44 (0)131 248 2901

My primary interest is in the use of dated molecular phylogenies to determine how geological and climatic events have affected the evolution of tropical plant taxa. The research integrates the disciplines of phylogenetics, taxonomy, palaeobotany, geology and palaeoclimatology.

Manilkara lacera, Campo Ma'an, Cameroon (photo Lars Chatrou).

RBGE now has an extensive research program in Colombia. Click here for details.

Biogeography and Effects of Environmental Change 

I study the response of tropical families to historical environmental changes. Sapotaceae, Begoniaceae, Gesneriaceae and Zingiberaceae are pantropical families of flowering plants that I am using as model groups to determine how tectonic and climatic events have affected the current global patterns in their distribution and diversity. In particular, a project on the Sapotaceae of Colombia aims to determine the affect of Andean uplift and other geological changes on diversification in this predominantly lowland group. Previous studies on the genus Inga have demonstrated that diversification occurred recently and coincided with, and thus may have resulted from, Andean uplift, closure of the Isthmus of Panama and Pleistocene climatic changes. Other focus groups at RBGE are the subject of similar studies, e.g. Renealmia, Aframomum, Amomum and Etlingera (Zingiberaceae) and Begonia (Begoniaceae) in Africa, Southeast Asia and Central America. Work continues on generating a phylogeny that will resolve relationships amongst species of Inga (Fabaceae) and help determine what factors have affected speciation in this genus. Previous work on Annonaceae focused on uncovering patterns in the evolution of the African wet forest flora that have been affected by climate change over the last 30 million years and I have also worked on the historical biogeography of Rhamnaceae. Work on Rhamnaceae included studies on the diversification of the genus Phylica in the Cape Flora of South Africa.

Manilkara staminodella, Osa Peninsula, Costa Rica (photo James Richardson).

Phylogenetics and classification

A substantial amount of molecular data has been generated for Sapotaceae by our research group and by colleagues at the Natural History Museum in Stockholm (Arne Anderberg and Ulf Swenson). Together we are working on the phylogeny of Sapotaceae to begin to address issues of generic delimitation in this taxonomically problematic group. A phylogeny that includes representatives of all African genera of Annonaceae and discovered a new genus in the family. I have also worked on a recircumscription of the tribal classification of Rhamnaceae based on molecular and morphological phylogenetic analyses. 

Monographic taxonomic research

The Asian species of the genus Manilkara (Sapotaceae) have been revised by Kate Armstrong who is a former RBGE PhD student. Several other groups within the family have been identified as target taxa for future revision including Southeast Asian Palaquium and the Afro-Malagasy genera, Mimusops, Faucherea, Labramia and Labourdonnasia. The Afro-Malagasy representatives of the genus Chrysophyllum (Sapotaceae) are the subject of a revision and molecular phylogenetic study being undertaken by Barbara MacKinder. I have also co-supervised projects that revised the species of Begonia in Sulawesi and a revision of the Sumatran species of Amomum (Zingiberaceae). Monographic studies on the African Annonaceae genera Monodora and Isolona by my PhD student (Thomas Couvreur) in the Netherlands were published in Systematic Botany Monographs. As of August 2013 these monographic studies works resulted in accounts of in excess of 100 species, 21 of which were new, and also a new genus in Annonaceae.

Manilkara fasciculata in West Papua (photo Kate Armstrong)

Manilkara fasciculata, West Papua, Indonesia (photo Kate Armstrong).

Sapotaceae Resource Centre

Together with Peter Wilkie (RBGE) I have developed a Sapotaceae Resource Centre website hosted by RBGE that includes a searchable specimen and names database, links to other Sapotaceae researchers, information on floristic accounts and a summary of past and present systems of classification for the family. Visit the Sapotaceae Resource Centre.

Herbarium Curation

Elspeth Haston, David Harris and I along with Peter Stevens (Missouri Botanical Garden) and Mark Chase (RBG Kew) developed a linear system of flowering plant families based on the APGIII classification upon which the re-organization of the RBGE herbarium was based. This system may be applied to the organization of other herbaria and to Floras.

Evolutionary Development

I co-supervised a PhD project on Begonia section Gireoudia that aims to provide the phylogenetic framework for evolutionary developmental studies on this group that are being conducted by Catherine Kidner and her research group.

Membership of Professional Bodies

Systematics Association Council from 2006 to 2008.

Adjunct Professor at the University of the Andes, Bogotá, Colombia. 

Associate Editor for Journal of Biogeography.

Editor of Colombia Forestal.

Other Duties

I teach Plant Geography to MSc and undergraduate students at the University of Edinburgh.

PhD Students

Thomas Couvreur (2004-2008). Evolution of Isolona and Monodora (Annonaceae) in Africa. Co-supervisors: Marc Sosef and Lars Chatrou (Wageningen University, the Netherlands). Thomas was a post-doctoral researcher at New York Botanical Garden and now works for IRD (Institut de Recherche pour le Developpement, http://www.ird.fr) at Montpellier, France.

Kate Armstrong (2006-2010). Systematics & biogeography of the pantropical genus Manilkara (Sapotaceae). Co-supervisors: Richard Milne and Graham Stone (University of Edinburgh). Kate is now a post-doc at the New York Botanical Garden.

Daniel Thomas (2007-2010). Dispersal across Wallaces' line? The systematics of Sulawesi Begonia. Co-supervisors: Mark Hughes (Royal Botanic Garden Edinburgh) and Rod Page (University of Glasgow). Daniel was a post-doctoral researcher at the University of Hong Kong and is now a researcher at Naturalis in Leiden, The Netherlands.

Nikki Harrison (2007-2012). Evolution of Diversity in Begonia section Gireoudia. Co-supervisor: Catherine Kidner (RBGE and University of Edinburgh).

Jane Droop (2008-2012). Taxonomic and phylogenetic studies in the genus Amomum (Zingiberaceae) in Sumatra. Co-supervisors: Mark Newman (RBGE) and David Burslem (University of Aberdeen).

Maria Camila Gomez Gutierrez (2010-2013). Evolution of Páramo. Co-supervisors: Richard Milne (University of Edinburgh), Toby Pennington (RBGE) and Santiago Madriñán (Universidad de Los Andes).

Eugenio Valderrama Escallón (2011-2014). Diversification rates in Renealmia (Zingiberaceae). Co-supervisor: Graham Stone (University of Edinburgh) and Santiago Madriñán (Universidad de Los Andes).

Roosevelt Garcia (2011-2014). Origin, biogeography, and evolution of Amazonian white-sand forests. Co-supervisors: Toby Pennington and Kyle Dexter (RBGE).

Lakmini Kumarage (2012-2015). Biogeography of Sri Lankan angiosperms. Co-supervisors: Mark Hughes (RBGE) and Richard Milne (University of Edinburgh).

Ana Maria Aldana (2011-2017). The affect of biodiversity and disturbance regimes on ecosystem services. Co-supervised by Pablo Stevenson and Mailyn Gonzalez (Universidad de Los Andes).

Adolfo Jara Muñoz (2011-2017). Systematics and biogeography of  Colombian Begonia. Co-supervised with Santiago Madriñán (Universidad de Los Andes).

Javier Luna Castro (2012-2015). Biogeography and floral development in Gesneriaceae. Co-supervised with Catherine Kidner and Michael Moeller.

Julieth Serrano (2013-2016). Biogeography of Colombian Sapotaceae. Co-supervised with Toby Pennington and Richard Milne.

Maria Fernanda Torres (2014-2017). Effects of Andean geographic history on the evolutionary dynamics of ant-plant coevolution in the plant family Melastomataceae. Co-supervised by Graham Stone.

Masters Students

Yumiko Baba (Royal Botanic Garden Edinburgh and University of Edinburgh). Historical biogeography of the genus Pterocarya (Juglandaceae) (2006). Yumiko is studying for her PhD at James Cook University, Australia.

Ruby Prickett (Royal Botanic Garden Edinburgh and University of Edinburgh). Molecular systematics of Rhododendron section Hymenanthes (2006).

Jurriaan de Vos (Wageningen University). Refuge Begonias - a Pleistocene radiation (2007). Jurriaan is studying for his PhD at the University of Zurich.

Sarah Cody (Royal Botanic Garden Edinburgh and University of Edinburgh). The timings of plant and animal migration and dispersal between South and Central America (2008).

Maria Camila Gomez Gutierrez (Universidad de Los Andes). Phylogeny and biogeography of Calamagrostis paramo species (2008). Maria Camila is studying for her PhD at RBGE and the University of Edinburgh.

Camilo Londoño Andrade (Universidad de Los Andes). Patrones de distribucion de la flora colombiana, analisis espacial, biogeografia y historia adaptativa de especies vegetales con base en patrones filogeneticos (2009).

Azrul M. Bakar (University of Edinburgh). A phylogenetic and biogeographic study of Isonandreae (Sapotaceae) with special reference to the genus Palaquium using ITS sequence data (2009; thesis awarded with distinction).

William Palmer (Royal Botanic Garden Edinburgh and University of Edinburgh). Dating asterids (2010). William is now studying for his PhD at the University of Cambridge.

Matti Niissalo (Royal Botanic Garden Edinburgh and University of Edinburgh). Biogeography of Sloanea (Elaeocarpaceae) (2011). Matti is at the National University of Singapore studying for his PhD.

Loic Cecilo (Royal Botanic Garden Edinburgh and University of Edinburgh). Phylogeography of Amazonian species of Inga (Fabaceae) (2011).

Julieth Serrano (University of Reading). Biogeography of Colombian Sapotaceae (2011). Julieth will begin her PhD at RBGE and The University of Edinburgh in October of 2013.

Gail Stride (University of Edinburgh). Biogeography and generic delimitation in Arabian Sapotaceae (2012).

Peter Moonlight (University of Edinburgh). Historical biogeography of Neotropical Begonia (2013).

Daniel Borg (University of Edinburgh). Morphology and systematics of Synsepalum and Englerophytum (Sapotaceae) (2013).

Undergraduate Students

Hannes Dempewolf (University of Edinburgh). Bayesian approaches to dating phylogenies (2006). Hannes has completed his PhD at the University of British Columbia and now works for the Global Crop Diversity Trust.

Sally Hinds (University of Edinburgh). Patterns of dispersal in Phylica (Rhamnaceae) (2006).

Alex Twyford (University of Edinburgh). Biogeography of Philippine Rhododendron section Vireya (2008). Alex is a PhD student at RBGE and the University of Edinburgh.

Ariadna Mondragon (Universidad de Los Andes). Biogeography of Sapotaceae in Colombia - effects of Andean uplift on a predominantly lowland tropical group.


(a) Refereed research papers

Costion, C.M., Edwards, W., Ford, A.J., Metcalfe, D.J., Cross, H.B, Harrington, M.G., RICHARDSON, J.E., Hilbert, D.W., Lowe, A.J. & Crayn, D.M. Accepted. Using phylogenetic diversity to identify ancient rain forest refugia and diversification zones in a biodiversity hotspot. Biodiversity and Distributions.

Armstrong, K., Stone, G., Nicholls, J., Valderrama Escallón, E., Anderberg, A.A., Smedmark, J., Gautier, L., Naciri, Y., Milne, R & RICHARDSON, J.E. Accepted. Patterns of diversification amongst tropical regions compared: a case study in Sapotaceae. Frontiers in Genetics.

Winterton, C., RICHARDSON, J.E., Hollingsworth, M., Clark, A., Zamora, N., Pennington, R.T. 2014. Historical biogeography of the Neotropical legume genus Dussia: the Andes, the Panams Isthmus and the Choco. Annals of the Missouri Botanical Garden.

RICHARDSON, J.E., Bakar, A.M., Tosh, J., Armstrong, K., Smedmark, J., Anderberg, A.A., Slik, F. & Wilkie, P. 2014. The influence of tectonics, sea-level changes and dispersal on migration and diversification of Isonandreae (Sapotaceae). Botanical Journal of the Linnean Society 174: 130–140..

Madriñán, S., Cortés, A.J. & RICHARDSON, J.E. 2013. Páramo is the world's fastest evolving and coolest biodiversity hotspot.Frontiers in Genetics: Evolutionary and Population Genetics. Frontiers in Genetics doi: 10.3389/fgene.2013.00192

Staats, M., Erkens, R.H.J., van de Vossenberg, B., Wieringa, J.J., Kraaijeveld. K., Stielow, B., Geml, J., RICHARDSON, J.E. & Bakker, F.T. 2013. Genomic Treasure Troves: Complete Genome Sequencing of Herbarium and Insect Museum Specimens. PLoS One 8: e69189. doi:10.1371/journal.pone.0069189

Sarkinen, T., Staats, M., RICHARDSON, J.E., Cowan, R., & Bakker, F.T. 2012. How to open the treasure chest: Optimising DNA extraction from herbarium specimens. PLoS One.

Chatrou, L.W., Erkens, R.H.J., RICHARDSON, J.E. Saunders, R.M.K. & Fay, M.F. 2012. The natural history of Annonaceae. Botanical Journal of the Linnean Society 169: 1-4.

Gower, D.J., Johnson, K.G., RICHARDSON, J.E., Rosen, B.R., Rüber, L. & Williams, S.T. 2012. Introduction. In: Gower, D. J., Richardson, J. E., Rosen, B. R., Rüber, L. & Williams, S. T. Biotic Evolution and Environmental Change in Southeast Asia, pages 1-15. Cambridge University Press.

RICHARDSON, J. E., Costion, C.M. & Muellner, A.M. 2012. The Malesian Floristic Interchange. In: Gower, D. J., Richardson, J. E., Rosen, B. R., Rüber, L. & Williams, S. T. Biotic Evolution and Environmental Change in Southeast Asia, pages 138-163. Cambridge University Press.

Staats, M., Cuenca, A., RICHARDSON, J.E., Vrielink-van Ginkel, R., Petersen, G., Seberg, O. & Bakker, F.T. Available online 2011. DNA damage in plant herbarium tissue. PloS One.

Thomas, D.C., Hughes, M., Phutthai, T., Ardi, W.H., Rajbhandary, S., Rubite, R., Twyford, A.D., & RICHARDSON, J.E. 2011. West to east dispersal and subsequent rapid diversification of the mega-diverse genus Begonia (Begoniaceae) in the Malesian archipelago. Journal of Biogeography 39: 98-113.

Thomas, D.C., Hughes, M., Phutthai, T., Rajbhandary, S., Rubite, R., Ardi, W.H. & RICHARDSON, J.E. 2011. A non-coding plastid DNA phylogeny of Asian Begonia (Begoniaceae): Evidence for morphological homoplasy and sectional polyphyly. Molecular Phylogenetics and Evolution 60: 428-444.

Warren, B.H., Bakker, F.T., Bellstedt, D.U., Bytebier, B., Claßen-Bockhoff, R., Dreyer, L.L., Edwards, D., Forest, F., Galley, C., Hardy, C.R., Linder, H.P., Muasya, A.M., Mummenhoff, K., Oberlander, K.C., Quint, M., RICHARDSON, J.E., Savolainen, V., Schrire, B.D., van der Niet, T., Verboom, G.A., Yesson, C. & Hawkins, J.A. 2011. Consistent phenological shifts in the making of a biodiversity hotspot: the Cape flora. BMC Evolutionary Biology 11: 39.

Couvreur, T.L.P., Pirie, M.D., Chatrou, L.W., Saunders, R.M.K., Su, Y.C.F., RICHARDSON, J.E. & Erkens, R.H.J. 2011. Early history of the flowering plant family Annonaceae: steady diversification and boreotropical geodispersal. Journal of Biogeography 38: 664-680.

Bartish, I.V., RICHARDSON, J.E., Antonelli, A. & Swenson, U. 2010. Vicariance or long-distance dispersal: historical biogeography of the pantropical subfamily Chrysophylloideae (Sapotaceae). Journal of Biogeography 38: 177-190.

Couvreur, T.L.P., Gort, G., RICHARDSON, J.E., Sosef, M.S.M., & Chatrou, L.W. 2010. Insights into the influence of priors in posterior mapping of discrete morphological characters: a case study in Annonaceae. PLoS One 5: 1-13.

Auvray, G, Harris, D.J., RICHARDSON, J.E., Newman, M.F. & Sarkinen, T.E. 2010. Phylogeny and dating of Aframomum (Zingiberaceae). In Diversity, Phylogeny and Evolution in the Monocotyledons (Seberg, O, Petersen, G, Barfod, A. & Davis, J.L. eds.), pp. 297-305. Aarhus University Press, Denmark.

Cody, S, RICHARDSON, J.E., Rull, V., Ellis, C. & Pennington, R.T. 2010. The great American biotic interchange revisited. Ecography 33: 1-7.

Kursar, T.A., Dexter, K.G., Lokvam, J., Pennington, R.T., RICHARDSON, J.E., Weber, M.G., Murakami, E.T., Drake, C., McGregor, R. & Coley, P.D. 2009. The evolution of antiherbivore defenses and their contribution to species coexistence in the tropical tree genus Inga. Proceedings of the National Academy of Sciences USA 106: 18073-18078.

Chatrou, L.W., Escribano, M.P., Viruel, M.A., Maas, J.W., RICHARDSON, J.E & Hormaza, J.I. 2009. Flanking regions of monomorphic microsatellite loci provide a new source of data for plant species-level phylogenetics 53: 726-733.

Chatrou, L.W., Couvreur. T.L.P. & RICHARDSON, J.E. 2009. Spatio-temporal dynamism of hotspots enhances plant diversity. Journal of Biogeography 36: 1628-1629.

Hollingsworth, P.M., Forrest, L.L., Spouge, J.L., Hajibabaei, M., Ratnasingham, N., van der Bank, M., Chase,, M.W., Cowan, R.S., Erickson, D.L., Fazekas, A.J., Graham, S.W., James, K.E., Kim, K.J., Kress, W.J., Schneider, H., van Alphen Stahl, J., Barrett, S.C.H., van den Berg, C., Bogarin, D., Burgess, K.S., Cameron, K.M., Carine, M., Chacón, J., Clark, A., Clarkson, J.J., Conrad, F., Devey, D.S., Ford, C.S., Hedderson, T.A.J., Hollingsworth, M.L., Husband, B.C., Kelly, L.J., Kesanakurti, P.R., Kim, J.S., Kim, Y.D., Lahaye, R., Lee, H.L., Long, D.G., Madriñán, S., Maurin, O., Meusnier, I., Newmaster, S.G., Park, C.W., Percy, D.M., Petersen, G., RICHARDSON, J.E., Salazar, G.A., Savolainen, V., Seberg, O., Wilkinson, M.J., Yi, D.K. & Little, D.P. 2009. A DNA barcode for land plants. Proceedings of the National Academy of Sciences USA 106: 12794-12797.

Hollingsworth, M.L., Clark, A., Forrest, L.L., RICHARDSON, J.E., Pennington, R.T., Long, D.G., Cowan, R., Chase, M.W., Gaudeul, M. & Hollingsworth, P.M. 2009. Selecting barcoding loci for plants: evaluation of seven candidate loci with species level sampling in three divergent groups of land plants. Molecular Ecology Resources 9: 439-457.

Couvreur. T.L.P., L.W. Chatrou, M.S.M. Sosef & J.E. RICHARDSON. 2008. Molecular phylogenetics reveal multiple tertiary vicariance origins of African rain forest trees. BMC Biology 6: 54-63.

Swenson, U., RICHARDSON, J.E. & Bartish, I.V. 2008. Multi-gene phylogeny of the pantropical subfamily Chrysophylloideae (Sapotaceae): Evidence of generic polyphyly and extensive morphological homoplasy. Cladistics 24: 1-26.

Couvreur, T.L.P., RICHARDSON, J.E., Sosef, M.S.M., Erkens, R.H.J. & Chatrou, L.W. 2008. Evolution of syncarpy and other morphological characters in African Annonaceae: a posterior mapping approach. Molecular Phylogenetics and Evolution 47: 302-318.

Chase, M.W., Cowan, R.S., Hollingsworth, P.M., van den Berg, C., Madriñán, S., Petersen, G., Seberg, O. Cameron, K.M., Kress, W.J., Hedderson, T.A.J., Conrad, F., Salazar, G., Carine, M., Barraclough, T.G., RICHARDSON, J.E., Hollingsworth, M., Jørgsensen, T., Kelly, L. & Wilkinson, M. 2007. A proposal for a standardized protocol to barcode all land plants. Taxon. 56: 295-299

Särkinen, T.E., M.F. Newman, P.J.M. Maas, H. Maas, A.D. Poulsen, D.J. Harris, J.E. RICHARDSON, A. Clark, M. Hollingsworth & R.T. Pennington. 2007. Recent oceanic long-distance dispersal and divergence in the amphi-Atlantic rain forest genus Renealmia L.f. (Zingiberaceae). Molecular Phylogenetics and Evolution 44: 968-980.

Haston, E., RICHARDSON, J.E., Stevens, P.F., Chase, M.W. & Harris, D.J. 2007. A linear sequence of Angiosperm Phylogeny Group II families. Taxon 56: 7-12.

Pennington, R.T., RICHARDSON, J.E. & Lavin, M. 2006. Insights into the historical construction of species-rich biomes from dated plant phylogenies, neutral ecological theory and phylogenetic community structure. New Phytologist 172: 605-616.

Couvreur T.L.P., Gereau R.E., Wieringa J.J. & RICHARDSON J.E. 2006. Description of four new species of Monodora and Isolona (Annonaceae) from Tanzania and an overview of Tanzanian Annonaceae diversity. Adansonia, sér. 3, 28: 243-266.

Pirie, M.D., Chatrou, L.W., Erkens, R.H.J., Maas, J.W., van der Niet, T., Mols, J.B. & RICHARDSON, J.E. 2005. Phylogeny reconstruction and molecular dating in four Neotropical genera of Annonaceae: the effect of taxon sampling in age estimations. Regnum Vegetabile 143, A.R.G. Gantner Verlag, Liechtenstein, pp.149-174.

Hollingsworth, P.M., Dawson, I.K., Goodall-Copestake, W.P., RICHARDSON, J.E., Weber, J.C., Sotelo Montes, C. & Pennington, R.T. 2005. Do farmers reduce genetic diversity when they domesticate tropical trees? A case study from Amazonia. Molecular Ecology 14: 497-501.

Pennington, R.T., Cronk, Q.C.B. & RICHARDSON, J.E. 2004. Introduction and synthesis: plant phylogeny and the origin of major biomes. Philosophical Transactions of the Royal Society London B59: 1455-1465.

RICHARDSON, J.E., Chatrou, L.W. Mols, J.B., Erkens, R.H.J. & Pirie, M.D. 2004. Historical biogeography of two cosmopolitan families of flowering plants: Annonaceae and Rhamnaceae. Philosophical Transactions of the Royal Society London B59: 1495-1508.

Calsbeek, R.G., Thompson, J.N. & RICHARDSON, J.E. 2003. Patterns of molecular evolution and diversification in a biodiversity hotspot: the California Floristic Province. Molecular Ecology 12:1021-1029.

RICHARDSON, J.E., Fay, M.F., Cronk, Q.C.B. & Chase, M.W. 2003. Species delimitation and the origin of populations in island representatives of the genus Phylica L. (Rhamnaceae). Evolution 57: 816-827.

RICHARDSON, J.E., Pennington, R.T., Pennington, T.D. & Hollingsworth, P.M. 2001. Rapid diversification of a species-rich genus of neotropical rain forest trees. Science 293: 2242-2245.

Fay, M.F., Lledó, M.D., RICHARDSON, J.E., Rye, B.L. & Hopper, S.D. 2001. Molecular data confirm the affinities of Granitites with Alphitonia (Rhamnaceae). Kew Bulletin 56: 669-675.

RICHARDSON, J.E., Weitz, F.M., Fay, M.F., Cronk, Q.C.B., Linder, H.P., Reeves, G. & Chase, M.W. 2001. Rapid and recent origin of species richness in the Cape flora of South Africa. Nature 412: 181-183.

RICHARDSON, J.E., Weitz, F.M., Fay, M.F., Cronk, Q.C.B., Linder, H.P., Reeves, G. & Chase, M.W. 2001. Phylogenetic analysis of Phylica L. with an emphasis on island species: evidence from plastid trnL-F DNA and nuclear internal transcribed spacer (ribosomal DNA) sequences. Taxon 50: 405-427.

RICHARDSON, J.E. 2000. In Walters et al. (eds.) European Garden Flora VI: Accounts of Myoporaceae, selected genera in Apocynaceae, Asclepiadaceae, Bignoniaceae, Boraginaceae, Buddleiaceae and Compositae.

RICHARDSON, J.E., Fay, M.F., Cronk, Q.C.B. & Chase, M.W. 2000. A revision of the tribal classification of Rhamnaceae. Kew Bulletin 55: 1-30.

RICHARDSON, J.E., Fay, M.F., Cronk, Q.C.B., Bowman, D. & Chase, M.W. 2000. A phylogenetic analysis of Rhamnaceae using rbcL and trnL-F plastid DNA sequences. American Journal of Botany 87: 1309-1324.

Thulin, M., Bremer, B., Chase, M.W., Niklasson, J., RICHARDSON, J.E. & Fay, M.F. 1998. Barbeya and Dirachma - Family Relationships of two Enigmatic Genera. Plant Systematics and Evolution 213: 103-119.

Fay, M.F., Olmstead, R.G., RICHARDSON, J.E., Santiago, E., Prance, G.T. & Chase, M.W. 1998. Molecular data support the inclusion of Duckeodendron cestroides in Solanaceae. Kew Bulletin 53: 203-212.

RICHARDSON, J.E. 1997. In Walters et al. (eds.) European Garden Flora V: Accounts of Primula, Anacardiaceae, Sapotaceae, Leeaceae, Alangiaceae, Corynocarpaceae, selected genera in Cistaceae, Ericaceae, Myrtaceae, Sterculiaceae, Thymelaeaceae, Umbelliferae and Vitaceae.

Williams, C.A., RICHARDSON, J.E., Greenham, J. & Eagles, J. 1993. Correlations between leaf flavonoids, taxonomy and plant geography in the genus Disporum. Phytochemistry 34: 197-203.

(b) Books and volumes authored or edited

Gower, D. J., RICHARDSON, J. E., Rosen, B. R., Rüber, L. & Williams, S. T. 2012. Biotic Evolution and Environmental Change in Southeast Asia. Cambridge University Press.

Chatrou, L.W., Erkens, R.H.J., RICHARDSON, J.E. Saunders, R.M.K. & Fay, M.F. 2012. The natural history of Annonaceae. Botanical Journal of the Linnean Society 169(1).

Pennington, R.T., RICHARDSON, J.E. & Cronk, Q.C.B. (eds). (2004). Plant phylogeny and the origin of major biomes. Philosophical Transactions of the Royal Society, Series B 359: 1453-1656.

(c) Websites

RICHARDSON, J.E., Wilkie, P., Pullan, M. & Watson, M.F. Sapotaceae Resource Centre.

(d) Articles in popular press

RICHARDSON, J.E. 2013. Colombian biodiversity hotspot needs Scotland's help. The Scotsman, 15th of October 2015.

RICHARDSON, J.E. & Harris, S. 2013. Colombia. Botanics Magazine. Summer Issue.

RICHARDSON, J.E. 2009. Botanizing in the land of Garcia-Marquez. Botanics Magazine. Winter Issue.

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