Peter C. van Welzen (born 1958), Dutch botanist.

• Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands (in 2020)
• Institute of Biology Leiden, Leiden University, P.O. Box 9505, 2300 RA Leiden, The Netherlands (in 2020)

IPNI standard form: Welzen

Taxon names authored

(List may be incomplete)

• 25 taxon names authored by Peter C. van Welzen

Publications

(List may be incomplete)

• van Welzen, P.C. 1988. Nineteen new species and a new combination in Guioa Cav. (Sapindaceae). Blumea 33(2): 411–421. PDF Reference page. 
• van Welzen, P.C. 1989. Guioa Cav. (Sapindaceae): taxonomy, phylogeny, and historical biogeography. Leiden Botanical Series 12(1): 1–134. PDF Reference page. 
• van Welzen, P.C. 1991. The Malesian species of Sarcopteryx Radlk. (Sapindaceae). Blumea 36(1): 87–103. PDF Reference page. 
• van Welzen, P.C., Piskaut, P. & Windadri, F.I. 1992. Lepidopetalum Blume (Sapindaceae): taxonomy, phylogeny, and historical biogeography. Blumea 36(2): 439–465. PDF ResearchGate Reference page. 
• Adema, F., Leenhouts, P.W. & van Welzen, P.C. 1994. Sapindaceae. Flora Malesiana. Being an Illustrated Systematic Account of the Malaysian Flora. Series 1. Spermatophyta. Vol. 11, part 3. Leiden: Rijksherbarium / Hortus Botanicus, Leiden University. ISBN 90-71236-21-8 BHL Reference page. 
• van Welzen, P.C. 1997. Guioa sarcopterifructa (Sapindaceae): a new Australian species. Austrobaileya 5(1): 103–105. JSTOR ResearchGate Reference page. 
• Slik, J.W.F. & van Welzen, P.C. 2001. A taxonomic revision of Mallotus sections Hancea and Stylanthus (Euphorbiaceae). Blumea 46(1): 3–66. PDF Reference page. 
• Arias Guerrero, S. & Welzen, P.C.van 2011. Revision of Malesian Endospermum (Euphorbiaceae) with Notes on Phylogeny and Historical Biogeography. Edinburgh Journal of Botany 68(3): 443–482. DOI: 10.1017/S0960428611000321 ResearchGate Reference page. 
• Chantarasuwan, B., Berg, C.C. & Welzen, P.C.van 2013. A revision of Ficus subsection Urostigma (Moraceae). Systematic Botany 38(3): 653–686. DOI: 10.1600/036364413X670241 BioOne ResearchGate Reference page. 
• Welzen, P.C. van & Oostrum, A.F. van 2015. Revision of the Malesian species of Dimorphocalyx (Euphorbiaceae). Blumea 59(3): 191–201. DOI: 10.3767/000651915X687903 Reference page. 
• Telford, I.R., Pruesapan, K., van Welzen, P.C. & Bruhl, J.J. 2016. Morphological and molecular data show Synostemon trachyspermus (Phyllanthaceae, Phyllantheae) to be a heterogeneous species assemblage. Australian Systematic Botany 29(3): 218–234. DOI: 10.1071/SB16008 Reference page. 
• van Welzen, P.C., Arias Guerrero, S., Arifiani, D., Bangun, T.J.F., Bouman, R.W., Eurlings, M.C.M., Gushilman, I., Phillipson, P.B., Tabak, I., Winkel, E. & Wurdack, K.J. 2020. Weda, a new genus with two new species of Euphorbiaceae‐Crotonoideae from Halmahera (North Maluku, Indonesia) and phylogenetic relationships of the Australasian tribe Ricinocarpeae. Journal of Systematics and Evolution 59(5): 1000–1017. DOI: 10.1111/jse.12581 Reference page.