Chonocentrum

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Malpighiales

Familia: Phyllanthaceae
Subfamilia: Antidesmatoideae
Genus: Chonocentrum
Species: C. cyathophorum
Name

Chonocentrum Pierre ex Pax & K.Hoffm. in H.G.A.Engler (ed.), Pflanzenr., 4, 147, 15: 205. (1922)

monotypic taxon

Note: This genus is difficult to place effectively in a tribe, although it is better in this subfamily due to some morphological similarities with Didymocistus Hoffmann et al., (2006).
References

Pierre, J.P.L. 1922. Das Pflanzenreich (Engler) 4, 147, 15: 205.
Govaerts, R. et al. 2020. Chonocentrum in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Apr. 16. Reference page.
Hayden, W.J. & Hayden, S.M. 1996. Two enigmatic biovulate Euphorbiaceae from the Neotropics: relationships of Chonocentrum and the identity of Phyllanoa. American Journal of Botany 83, p.162.
Hoffmann, P., Kathriarachchi, H. & Wurdack, K.J. 2006. A phylogenetic classification of Phyllanthaceae (Malpighiales; Euphorbiaceae sensu lato). Kew Bulletin 61(1): 37–53. JSTOR ResearchGate Reference page.
International Plant Names Index. 2020. Chonocentrum. Published online. Accessed: Apr. 16 2020.

Chonocentrum is a genus of the family Phyllanthaceae described as a genus in 1922.[2][3] It contains only known species, Chonocentrum cyathophorum, native to the State of Amazonas in northwestern Brazil.[1][4]

The genus is still not well understood; W. John Hayden has observed that the plant seems have been collected just once, in upper Rio Negro of Brazil in the 1850s,[5] and suggests that it has been misplaced taxonomically.[6][7]
References

Kew World Checklist of Selected Plant Families
Pax, Ferdinand Albin & Hoffmann, Käthe. 1922. Das Pflanzenreich 147,15(Heft 81): 205
Tropicos, Chonocentrum Pierre ex Pax & K. Hoffm.
Govaerts, R., Frodin, D.G. & Radcliffe-Smith, A. (2000). World Checklist and Bibliography of Euphorbiaceae (and Pandaceae) 1-4: 1-1622. The Board of Trustees of the Royal Botanic Gardens, Kew.
Müller Argoviensis, Johannes. 1866. Prodromus Systematis Naturalis Regni Vegetabilis 15(2): 454 in Latin
Hayden, W. J., & S. M. Hayden. 1996. Two enigmatic biovulate Euphorbiaceae from the neotropics: relationships of Chonocentrum and the identity of Phyllanoa. A.I.B.S. Annual Meeting, Seattle, Washington. American Journal of Botany 83(6-supplement): 162.
Hayden, W. J., & S. M. Hayden. 2000. Relationships of Chonocentrum (Euphorbiaceae). Virginia Academy of Science Meeting, Radford University, Radford, VA. Virginia Journal of Science 51: 95.