Selected publications:

- Hyacintorchis - Een nieuwe orchidee aan de Noordzee.
Author: Esmée Winkel. ISBN 978 90 5011 807 1. Order here.

- Heukels' Flora van Nederland. Author: Leni Duistermaat. ISBN/EAN 9789001589561, Order here.

- Botanical Art Techniques. American Society of Botanical Artists. Authors: Carol Woodin, Robin Jess. ISBN-10 1604697903, ISBN-13 978-1604697902, Order here.

- Wie wat bewaart. Author: Menno Schilthuizen. ISBN 9789000362493.

- Van Onschatbare waarde, 200 jaar naturalis. Authors: Eulàlia Gassó Miracle and Tiny Monquil-Broersen. ISBN 9789462496279.

- RHS Botanical Illustration - The Gold Medal Winners. Author: Charlotte Brooks. ISBN 978-1-78884-014-9, Order here.

- Flora Malesiana, Lamiaceae, Vol 23 - 2019, Series I - Seed Plants. Author: G.L.C. Bramley. ISBN 978-90-6519-019-2.

- Out of the Woods: Celebrating Trees in Public Gardens. American Society of Botanical Artists & The New York Botanical Garden. Sku 978-0893279530.

- Timber trees of Suriname, An identification Guide. Authors: Chequita R. Bhikhi, co-authors: Paul Maas, Jifke Koek-Noorman, Tinde van Andel. ISBN 9789460223914.

- 19th Annual International. American Society of Botanical Artists & The Horticultural Society of New York at New York Design Center. ISBN 978-0-9905616-5-1.

- 18th Annual International. American Society of Botanical Artists & The Horticultural Society of New York at New York Design Center. ISBN 978-0-9905616-3-7.

- Description and drawings of the comparative morphology of mouth parts of various insects. 2013. Esmée Winkel. ISBN 978-90-818621-6-5.

- Bloeiende Bollen, Blooming Bulbs. 2011. Vereniging botanisch kunstenaars Nederland. ISBN 978-90-818765-0-6.

- Hunt Institute for Botanical Documentation. 2010. 13th International exhibition of botanical art & illlustration. ISBN 978-0-913196-84-7.

- Siebolds bloemen tuin. 2010. Sieboldhuis. ISBN 2000000000718-8.



Contributions to scientific papers
 

- Jongkind, C.C.H. & O. Lachenaud. 2022. Novelties in African Apocynaceae. Candollea 77:17–51

- Merijn A G de Bakker, Wessel van der Vos, Kaylah de Jager, Wing Yu Chung, Donald A Fowler, Esther Dondorp, Stephan N F Spiekman, Keng Yih Chew, Bing Xie, Rafael Jiménez, Constanze Bickelmann, Shigeru Kuratani, Radim Blazek, Peter Kondrashov, Marilyn B Renfree, Michael K Richardson, Selection on Phalanx Development in the Evolution of the Bird Wing, Molecular Biology and Evolution, 2021;, msab150. Read here.

- C. A. J. Kreutz, J. C. Zuyderduyn. 2021. Hyacintorchis (Himantoglossum robertianum), een nieuwe orchideeënsoort voor Nederland. Gorteria – Dutch Botanical Archives  43, 2021: 070 – 088. Read here.

- Fijridiyanto, I.A., Smets, E., Arifiani, D. 2020. Taxonomic revision of Dehaasia (Lauraceae) in Sumatra. Blumea 65, 2020: 167–175.

- J. Hengstmengel. 2020. Emendations to tissue typology in discomycetes. Mycological Progress 19:543–558

- R.-Y. Yu, P.C. van Welzen. 2020. A taxonomic revision of Trigonostemon (Euphorbiaceae) outside Malesia. Blumea 65,2020:25–52

- R.-Y. Yu, E.M.G. Agoo, J.R. Callado, P.C. van Welzen. 2020. Taxonomic notes on Trigonostemon (Euphorbiaceae) in the Philippines. Blumea 65,2020:12–24.

- Kusuma Wati R., Vugt R.R. van, Gravendeel B. 2018. A Linnaeus NG interactive key to the species of Glomera (Orchidaceae, Coelogyninae) from Southeast Asia. PhytoKeys (110) : 9-22.

- Van Welzen, P.C. 2018. The genus Baliospermum (Euphorbiaceae) in Malesia. Blumea 63, 2018: 125–129.

- Bouman, R.; van Welzen, P.C.; Sumail, S.; Echevarria, G.; Erskine, P.D.; van der EntBouman, A. 2018. Phyllanthus rufuschaneyi: a new nickel hyperaccumulator from Sabah (Borneo Island) with potential for tropical agromining. Botanical Studies (2018) 59:9.

- Yu, R.-Y.; van Welzen, P.C. 2018. A taxonomic revision of Trigonostemon (Euphorbiaceae) in Malesia. Blumea 62, 2018: 179 – 229.

- Heijkoop, M.; van Welzen, P.C. 2017. A revision of the genus Actephila (Phyllanthaceae) in the Malesian region. Blumea 62, 2017: 7– 25

- Erkens, R.H.J., Oosterhof, J., Westra, L.Y.T., Maas, P.J.M. 2017. Revisions of Ruizodendron and Pseudephedranthus (Annonaceae) including a new species and an overview of most up-to-date revisions of Neotropical Annonaceae genera. PhytoKeys 86: 75–96.

- Junikka, L.; Maas, P.J.M.; Maas-van de Kamer, H.; Westra, L.Y.Th. 2016. Revision of Oxandra (Annonaceae). Blumea 61, 2016: 215–266
 
- Van der Ent, A.; van Balgooy, M.; van Welzen, P.C. 2016. Actephila alanbakeri (Phyllanthaceae): a new nickel hyperaccumulating plant species from localised ultramafic outcrops in Sabah (Malaysia). Van der Ent et al. Bot Stud  (2016) 57:6

- Phyo Kay Khine, Stuart Lindsay, Christopher Fraser-Jenkins, Jürgen Kluge, Myint Kyaw, Peter Hovenkamp. 2016. Selliguea kachinensis (Polypodiaceae), a new fern species of uncertain affinity from Northern Myanmar. PhytoKeys 62: 73–81 (2016)

 - De Vogel, Winkel, E., van Vugt, R. 2016. Dendrobium cleistanthum and D. kruizingae, Two New Species of Section Crinifera from Papua New Guinea. Malesian Orchid J. 18: 108.

- Junikka, L., Maas, P.J.M., Maas-van de Kamer, H., Westra, L.Y.T. 2016. Revision of Oxandra (Annonaceae). Blumea 61, 2016: 215-266.

- Hoekstra PH, Wieringa JJ, Chatrou LW (2016) A nonet of novel species of Monanthotaxis (Annonaceae) from around Africa. PhytoKeys 69: 71-103.

- Adema, F., Ohashi, H., Sunaro, B. 2016. Notes on Malesian Fabaceae (Leguminosae - Papilionoideae) 17. The genus Dalbergia. Blumea 61, 2016: 186-206.

- Wiriadinata, H., Ohashi H., Adema, F. 2016. Notes on Malesian Fabaceae (Leguminosae-Papilionoideae) 16. The genus Mucuna. Blumea 61, 2016: 90-124.

- Ottens-Treurniet, M.A.D. & Van Welzen, P.C. 2016. A revision of the Malesian genus BlumeodendronEuphorbiaceae). Blumea 61, 2016: 64–82.

-Dirkse, G.M., Zonneveld, B.J.M., Duistermaat, L.H. 2015. Cardamine hamiltonii G.Don – Aziatische veldkers (Brassicaceae) in Nederland. Gorteria 37 (2014–2015): 64-70.

- Maas, P.J.M., Westra, L.Y.T., Arias Guerrero, S. et al. 2015. Confronting a morphological nightmare: revision of the Neotropical genus Guatteria (Annonaceae). Blumea 60, 2015: 1-219.

- Sulistyo B, Boos R, Cootes J, Gravendeel B. 2015. Dendrochilum hampelii (Coelogyninae, Epidendroideae, Orchidaceae) traded as ‘Big Pink’ is a new species, not a hybrid: evidence from nrITS, matK and ycf1 sequence data. PhytoKeys 56: 83-97. doi: 10.3897/phytokeys.56.5432

- Van Welzen, P.C. & Winkel, E. 2015. A revision of Ostodes (Euphorbiaceae) in Malesia. Blumea 59, 2015: 185–190.

- Karremans, A.P., Bogarín, D., Gravendeel, B. 2015. Specklinia lugduno-batavae (Pleurothallidinae: Orchidaceae), a new species in the S. digitalis group. Blumea 59, 2015: 180–184.

- Van Welzen, P.C. & van Oostrum, A.F. 2015. Revision of the Malesian species of Dimorphocalyx  (Euphorbiaceae). Blumea 59, 2015: 191-201.

- Veldkamp, J.F. 2015. Arundinella (Gramineae) in Malesia with notes on other taxa and on aluminium accumulation. Blumea 59, 2015: 167-179.

- de Vogel, E., Winkel, E. and van Vugt, R. 2014. Dendrobium goodallianum, a new species of section Grastidium from Papua New Guinea. Malesian Orchid Journal 14: 87-90.

- Sirichamorn, Y., Adema, F.A.C.B. & van Welzen, P.C. 2014. Derris solorioides (Fabaceae), a new limestone species with true-paniculate inflorescences from North-Central Thailand. Blumea 59, 2014: 98-102.

- Hoekstra, P.H., Chatrou, L.W. & Jan J. Wieringa. 2014. A new species of Monanthotaxis from Gabon with a unique inflorescence type for Annonaceae. Phytotaxa 186(2): 106–11 2.

- Dirkse, G.M., Reijerse, F.A.I., Duistermaat, L.H. 2014. De ontrafeling van in Nederland ingeburgerde Amerikaanse herfstasters (Symphyotrichum Nees subg. Symphyotrichum sect. Symphyotrichum, Asteraceae). Gorteria 37 (2014–2015): 1-24.

- Stoops, E. & van Welzen, P.C. 2013. A revision of Ptychopyxis (Euphorbiaceae) in  southeast Asia. Nordic Journal of Botany 31: 94—112.

- Tanawat Chaowasku & Paul J.A. Keßler. 2013. Phylogeny of Miliusa (Magnoliales: Annonaceae: Malmeoideae: Miliuseae), with descriptions of two new species from Malesia. European Journal of Taxonomy 54: 1-21, Fig. 3, 5.

- Ed de Vogel, Rogier van Vugt, Malcolm Perry, Esmée Winkel & Eline Hoogendijk. 2013. Chelonistele maximae-reginae (Orchidaceae), an attractive new species of unknown provenance. Malesian Orchid Journal 12: 5-12. ISSN 1985-3912.

- Kevin van den Hof, Thomas Marcussen, Ronald van den Berg, Eddy Weeda & Barbara Gravendeel. 2013. Phenotypic plasticity and nomenclature of Viola stagnina (V. persicifolia nom. ambig. props.). Gorteria 36: 61-84. ISSN 0017-2294.

- Van Welzen, P.C. 2012. Five rare genera of Euphorbiaceae (sensu lato) in the Malay Archipelago: Alphandia, Ashtonia, Borneodendron, Cladogynos and Tapoides. Edinburgh Journal of Botany 69: 389—411.  

- Pupulin, F., A.P. Karremans & B. Gravendeel. 2012. A reconsideration of the empusellous species of Specklinia (Orchidaceae: Pleurothallidinae) in Costa Rica. Phytotaxa 63: 1-20.

- Van Welzen, P.C. & Forster, P.I. 2011. Picrodendraceae. In: Nooteboom, H. (ed.), Flora Malesiana ser. 1, 20: 45—61.

- Van Welzen, P.C. 2011. Revision of Dicoelia (Phyllanthaceae; Euphorbiaceae s.l.). Blumea 56: 209—213.

- Tanawat Chaowasku, Paul J.A. Keßler, Suwit Punnadee & Raymond W.J.M. van der Ham. 2011. Taxonomic novelties and pollen morphological study in the genus Neo-uvaria (Annonaceae). Phytotaxa 32: 27–42.

- Arias Guerrero S., Welzen P.C. van 2011. Revision of Malesiana Endospermum (Euphorbiaceae) with notes on phylogeny and historical biogeography. Edinburgh Journal of Botany 68: 443-482.

- Van Welzen, P.C. & Forster, P.I. 2010. A revision of Malesian Austrobuxus (Picrodendraceae/Euphorbiaceae s.l. subfam. Oldfieldioideae). Nordic Journal of Botany 28: 189—195

- Hou, D., Savinov, I.A. & van Welzen, P.C. 2010. Celastraceae. In: Santisuk, T. & Larsen, K. (eds.), Flora of Thailand 10, 2: 141—198. The Forest Herbarium, Bangkok. 
                  




Phd Theses

- Abdulrokhman Kartonegoro. 2021. Systematics and Biogeography of the Dissochaeta alliance (Melastomataceae). Naturalis Biodiversity Center and Leiden University.

- Rich Kusuma Wati. 2021. Systematics, epidermal defense and bioprospecting of wild orchids. Naturalis Biodiversity Center and Leiden University.

- Ren-Yong Yu. 2019. A Monograph of the plant genus Trigonostemon Bluma. Naturalis Biodiversity Center and Leiden University.

- Adam Karremans. 2015. Systematic, phylogenetic and pollination studies of Specklinia (Orchidaceae). Naturalis Biodiversity Center, Leiden University and Lankester Botanical Garden, Universidad de Costa Rica.

- Tanawat Chaowasku. 2014. The Miliuseae revisited: Phylogenetic, taxonomic and palynological studies in a major clade of Annonaceae. Naturalis Biodiversity Center and Leiden University.

- Abishkar Subedi. 2011. New species, pollinator interactions and pharmaceutical potential of Himalayan orchids. National Herbarium of the Netherlands, Leiden.

- Hoang Van Sam. 2009. Uses and conservation of plant diversity in Ben En National park, Vietnam. National Herbarium of the Netherlands, Leiden. These drawings have also been published in: Hoang Van Sam, Baas, P. & Kessler, P.A.J. 2008. Plant Biodiversity in Ben En National Park, Vietnam. Agricultural Publishing House, Hanoi.

- Kevin van den Hof. 2006. Scientific research regarding the evolutionary relationships of Viola stagnina and several closely related species. National Herbarium of the Netherlands, Leiden.