Preliminary observations on flower visitors of Lespedeza subgenus Macrolespedeza in Korea

摘要

Flower visitors of four species of Lespedeza subgen. Macrolespedeza were observed in Korea for the first time. The major flower visitors were apoid bees, especially Apis, Tetralonia, Megachile, and Bombus. They showed a considerable degree of flowerconstancy to Macrolespedeza judging from analyses of pollen loads, hence they were considered to be important pollinators for Macrolespedeza. Significant differences were not observed in flower visitor fauna among the species except L. melanantha which represented predominance of Bombus. Although the predominance of Bombux has not mentioned so far in Lespedeza, it was the most important pollinator for L. melanantha.