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The sedge family, Cyperaceae, is the third largest family of monocotyledonous plants. They are of significant economic importance, especially among rural communities in the tropics, where sedges are intensively used. The World Checklist of Cyperaceae is a unique resource that lists all validly published names of sedges, providing the source of their publication and indication of which names are currently accepted and which are synonyms. It will be a standard nomenclatural reference for further research into this important family.

Dioscoreales are a small but systematically and economically significant order of monocotyledons. The most diverse and important member is the yam genus, Dioscorea L., a source of dietary starch at macroeconomic to rural community levels. Other species of Dioscorea provided the chemical basis of corticosteroid drugs and oral contraceptives. Ally families comprise the unusual, largely achlorophyllous (heteromycotrophic) Burmanniaceae and the relatively unspecialised Nartheciaceae.

The World Checklist of Dioscoreales lists all validly published names of yams and their allies, providing the source of their publication and indication of which names are currently accepted and which are synonyms, making it a standard nomenclatural reference for further research into this important family.

Myrtaceae is the ninth largest flowering plant family; it is economically important in the production of timber, gums, essential oils, fruits and spices, and contains many commonly cultivated ornamentals. The family is particularly rich in large genera, often found in some of the world's most threatened ecosystems, where their fruits comprise an important part of the diet of primates and birds. The similarity of Myrtaceae species is high, and its taxonomic and nomenclatural history is complex, resulting in notorious difficulties in basic identification, inventory compilation and floristic treatment.

The World Checklist of Myrtaceae is a much needed work that lists all validly published names in the family, providing the source of their publication and indicating which names are currently accepted and which are synonyms. It will be respected as the standard nomenclatural reference for further research into this important family.