Leni Duistermaat

Lenie Duistermaat

Ever since I was little I’ve had a keen interest in plants, even before I could read I wanted to know the names of all the flowers I saw around me. At the age of nine I knew I wanted to become a botanist. With this focus I studied Biology at Leiden University, persuing a career in plant taxonomy.  I want to produce userfriendly identification keys, floras and field guides, thereby enabling professionals as well as the layman to correctly identify the plants that they held in their hands.


Flora, plant taxonomy, netherlands, poaceae, peninsular malaysia, amischotolype, invasive plant species, se asia

Dr. Leni Duistermaat

Tropical Botany

+31 (0)71 751 9200


My main interest is in plant taxonomy: produce revisions and (contributions to) floras, based on both morphological and molecular characteristics.

More specifically, I am interested in the vascular plant flora of the Netherlands, to produce an update of the standard flora Heukels’ Flora van Nederland. Besides, I have a special interest in several monocot groups of SE Asia (as Honorary staff member): Poaceae, in particular of Peninsular Malaysia; Commelinaceae, especially Amischotolype; to a lesser extent Cyperaceae. Finally, as Q-bank curator for the Consortium invasive plant species, I am interested in invasion biology and risk assessments.

Leni Duistermaat
Anemona nemorosa


A selection of the topics I am working on currently.


Flora of the Netherlands

We provide identifications of Dutch vascular plants for both the layman and professional organizations. Our program ‘Nature of the Netherlands’ serves to make a significant contribution to the knowledge of and appreciation for the natural environment in…
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Large water pennywort

Invasive species

In recent decades, the Dutch flora has seen a sharp increase in exotic species. We call them invasive species or invasives when they cause nuisance by a strong expansion or densification of their area. The nuisance of invasive species can consist of…
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  • Duistermaat, H.. Herbariummateriaal verzamelen nog van deze tijd?!, Instructions for collecting herbarium material.
  • Duistermaat, H. 1987. A revision of Oryza (Gramineae) in Malesia and Australia. Blumea 32: 157—193.
  • Duistermaat, H. 1996. Monograph of Arctium L. incl. Cousinia Cass. p.p. (Asteraceae): Generic delimitation (including Cousinia Cass. p.p.), revision of the species, pollen morphology, and hybrids. Thesis Leiden University. Also published as Gorteria Supplement 3: 143 p.p.
  • Duistermaat, H. 2005. Field Guide to the Grasses of Singapore (Excluding the Bamboos). Supplement to The Gardens’ Bulletin Singapore 57: 1—177.
  • Van de Wiel, C.C.M., J. van der Schoot, J.L.C.H. van Valkenburg, Duistermaat, H. & M.J.M. Smulders, 2009. DNA barcoding discriminates the noxious invasive plant species, floating pennywort (Hydrocotyle ranunculoides L.f.), from non-invasive relatives. Molecular Ecology Resources 9: 1086—1091.
  • Duistermaat, H. 2012. A taxonomic revision of Amischotolype (Commelinaceae) in Asia. Gardens’ Bulletin Singapore 64: 51—131.
  • Ghahramanzadeh, R., Esselink, G., Kodde. L.P., Duistermaat, H., Valkenburg, J.L.C.H. van, Marashi, S.H., Smulders, M. J. M. & Wiel, C.C.M. van de. 2013. Efficient distinction of invasive aquatic plant species from non-invasive related species using DNA barcoding. Molecular Ecology Resources: 13, 1 (2013) 21—31. doi: 10.1111/1755-0998.12020
  • Leewis, R., Duistermaat, H., Gittenberger, A., Have, T. van der, Soes, M. & Valkenburg, J. van. 2013. Veldgids Exoten.  191 pp. KNNV Uitgeverij, Zeist.
  • Dirkse, G.M., Zonneveld, B.J.M., Duistermaat, H. 2015. Cardamine hamiltonii G.Don – Aziatische veldkers (Brassicaceae) in Nederland. Gorteria 37: 64-69.
  • Veldkamp, J.F., Duistermaat, H., K.M. Wong & D.J. Middleton, 2019. - Poaceae (Gramineae). Middleton, D.J. et al. (eds.), Flora of Singapore 7: 219-501.


Excursions of year 1 (2 days, and since 2014 5 days, Biology curriculum, Leiden University; 2007, 2012- )