Dr. Hans-Joachim Esser

Research Scientist and Curator of Vascular Plants
Scientific Representative of the Library

Botanische Staatssammlung München
Menzinger Straße 67
80638 München, Germany
Phone +49-(0)89-17861-264
Fax +49-(0)89-17861-193
Email esser@bsm.mwn.de

Research Interests
Flora of the Southeast-Asian tropics and of the Neotropics.
Systematics of Araliaceae (in particular Brassaiopsis and Dendropanax), Euphorbiaceae (in particular Croton, Euphorbia and tribe Hippomaneae), Polyosmaceae, and Rutaceae (in particular Glycosmis).
The botanical collections of C.F.P. von Martius (Brazil), P.F. von Siebold (Japan) and C.C. Hosseus (Thailand).

Current projects

Selected publications
ESSER, H.-J. 1997. A revision of Omalanthus (Euphorbiaceae) in Malesia. – Blumea 42: 421–466.
ESSER, H.-J. 1999. Taxonomic notes on Neotropical Maprounea (Euphorbiaceae). – Novon 9: 32–35.
ESSER, H.-J. 2001. Tribes Hippomaneae, Hureae, Pachystromateae. – Pp. 352–397 in A. RADCLIFFE-SMITH, Genera Euphorbiacearum. Royal Botanic Gardens, Kew.
ESSER, H.-J. 2002. A revision of Triadica (Euphorbiaceae). – Harvard Papers Bot. 7: 17–21 (pdf).
ESSER, H.-J. 2003. Fruit characters in Malesian Euphorbiaceae. – Telopea 10: 169–177 (pdf).
ESSER, H.-J. 2005. Croton, Euphorbia. – Pp. 189–226, 263–292 in Flora of Thailand 8(1). The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
ESSER, H.-J. 2012. The tribe Hippomaneae (Euphorbiaceae) in Brazil. – Rodriguesia 63: 209–225 (pdf).
ESSER, H.-J., P. E. Berry & R. Riina (2009). EuphORBia: a global inventory of the spurges. – Blumea 54: 11–12.
ESSER, H.-J. & K. CHAYAMARIT. 2001. Two new species and a new name in Thai Croton (Euphorbiaceae). – Thai For. Bull. (Bot.) 29: 51–57.
ESSER, H.-J. & D. G. FRODIN. 2004. Brassaiopsis. – Pp. 98–105 in D. FRODIN & R. GOVAERTS, World Checklist and Bibliography of Araliaceae. Royal Botanic Gardens, Kew.
ESSER, H.-J. & M. H. P. JEBB. 2005. Aralidiaceae. – Pp. 7–9 in Flora of Thailand 9(1). The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
ESSER, H.-J. & M. H. P. JEBB. 2010. A new Schefflera and taxonomic notes on Araliaceae from Thailand. – Thai For. Bull. (Botany) 38:160–166 (pdf).
ESSER, H.-J., WELZEN, P. C. VAN & T. DJARWANINGSIH. 1998 (‘1997’). A phylogenetic classification of the Malesian Hippomaneae (Euphorbiaceae). – Syst. Bot. 22: 617–628.
SILVA, M.J. & H.-J. ESSER. 2011. Tow new taxa and two new combinations in Microstachys (Euphorbiaceae) from South America. – Phytotaxa 32: 18–26.