2017 ASHS Annual Conference

The group of Citrus species described by W.T. Swingle and P.C. Reece in 1967 as Subgenus Papeda is a crucial but little-known part of citrus cultivation and germplasm resources. Native to southern and eastern Asia, they have acrid pulp and large, broadly winged petioles, and include such species as C. micrantha, the seed parent of the true lime; C. hystrix (kaffir lime), whose leaves are important in Thai cooking; C. ichangensis, a parent of C. junos (yuzu); and C. macroptera (satkara), important in Bengali cuisine. David Karp is Associate in the Agricultural Experiment Station at the University of California, Riverside, where he has studied, photographed (and tasted!) the papedas. He will provide an up-to-date review of papeda taxonomy and nomenclature, including descriptions of the main species; phylogenic relationships, as indicated by recent genetic analyses; cultivation in the United States and abroad; economic and culinary uses; and quarantine issues related to the demand for these exotic species.