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Revision of Excoecaria

Revision of the Malesian species of Excoecaria (euphorbiaceae)

Peter van Welzen


Period & duration
start preferably not during Biodiversity courses and after databasing of collections; duration 9 months. Please, discuss date of research well in advance.

Study & level
Biology, MSc

Background & context
Probably Excoecaria has 6 species in Malesia, which need revision. One species, E. agallocha, the only one with only alternate leaves, is only growing in the mangrove or close to salt water, while all other species (usually) have opposite leaves. The flowers are very reduced (see drawings)Typical are the solitary flowers on long pedicels. One species, E. oppositifolius, is sometimes seen as a very broad, diverse species, sometimes it is split up in various species. The genus has to be revised for treatment in Flora Malesiana and a preliminary revision is present.

Excoecaria agallocha_1

Objectives & goals
Which species of Excoecaria occur in Malesia and what is their variation.

To be published in a journal, on the Euphorbiaceae website and finally in Flora Malesiana.

Courses Biodiveristy I+II.

Excoecaria agallocha_2