Revision of the genus Croton (Euphorbiaceae) for Java and the Lesser Sunda Islands (Indonesia and Timor-Leste)

The Croton species ( Euphorbiaceae ) from Java and the Lesser Sunda Islands (Indonesia, Timor Leste) are revised. In total 16 species were recognized, 12 species for Java, and 11 for the Lesser Sunda Islands (overlapping in seven species); included are four species new to science, C. brevipetiolatus (W Java and SE Borneo), C. pseudoverticillatus (Lesser Sunda Islands: Flores), C. sumbensis (Lesser Sunda Islands: Sumba, Flores, Timor), and C. tetraglandulosus (Java). Various lectotypes are indicated.