THE TAXONOMY AND DISTRIBUTION OF ECHINOCHLOA SPECIES (BARNYARD GRASSES) IN THE ASIAN-PACIFIC REGION, WITH A REVIEW OF PERTINENT BIOLOGICAL STUDIES

摘要

Lists of Echinochloa (barnyard grass) taxa (species, subspecies, varieties, forms) are collated from the most recent taxonomic treatments of the genus for various countries (or areas) throughout the Asian-Pacific region, followed by a discussion of the taxonomic problems raised. Special attention is given to the naming of forms within the very variable E. colona and E. crus-galli and to the epithets caudata, crus-pavonis, hispidula, phyllopogon, and zelayensis which appear to have often been misused. A case is put for alternative (but legitimate) names to be used where it is considered appropriate, for example, E. glabrescens and E. crus-galli var. formosensis are true synonyms and may be used interchangeably without confusion. Comments are given on new taxa that have not yet been described. Recent biological studies of the genus pertinent to the taxa occurring in the Asian-Pacific Region are reviewed. A key to the taxa with notes on distribution within the region is presented.