''Cyathocalyx'' is a small

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of 7

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

distributed throughout the floristic regions of the

Indian subcontinent The Indian subcontinent is a physiographic region of Asia below the Himalayas which projects into the Indian Ocean between the Bay of Bengal to the east and the Arabian Sea to the west. It is now divided between Bangladesh, India, and Pakista ...

Indo-China Mainland Southeast Asia (historically known as Indochina and the Indochinese Peninsula) is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to th ...

and

Malesia Malesia is a biogeographical region straddling the Equator and the boundaries of the Indomalayan and Australasian realms. It is a phytogeographical floristic region in the Paleotropical kingdom. It was first recognized as a distinct region ...

. The name ''Cyathocalyx'' was erected as a genus in 1855 by

Joseph Dalton Hooker Sir Joseph Dalton Hooker (30 June 1817 – 10 December 1911) was a British botanist and explorer in the 19th century. He was a founder of geographical botany and Charles Darwin's closest friend. For 20 years he served as director of the Ro ...

and Thomas Thomson. Since then the delimitation of the genus has proved problematic, with various taxonomists proposing different assessments of the scope of the genus. In 2006 Rui Jiang Wang and

Richard M.K. Saunders Richard M. K. Saunders (born 1964) is a botanist. Work Among other subjects, his work has focused on the systematics and evolution of Annonaceae, a family of flowering plants. Legacy He is the authority for the following taxa In bio ...

reduced the size of the genus from the then 36 species to 15. The genus was further reduced in 2010 to just seven species.

Species

Plants of the World Online Plants of the World Online (POWO) is an online taxonomic database published by the Royal Botanic Gardens, Kew. History Following the Convention on Biological Diversity, the Royal Botanic Gardens in Kew launched Plants of the World Online i ...

accepts the following 7 species: * '' Cyathocalyx annamensis'' * '' Cyathocalyx globosus'' * '' Cyathocalyx harmandii'' * '' Cyathocalyx magnifructus'' * '' Cyathocalyx martabanicus'' * '' Cyathocalyx sumatranus'' * '' Cyathocalyx zeylanicus''

References

{{Taxonbar, from=Q5197637 Annonaceae genera Taxa named by Joseph Dalton Hooker