&lt;I&gt;Geophila erythrocarpa&lt;/I&gt; (&lt;I&gt;Rubiaceae&lt;/I&gt;), a new species from D.R. congo and Zambia

Dessein, Steven; Vanthournout, S.; Niyongabo, Ferdinand

doi:10.3767/000651911x589212

Cited by 1 publication

(2 citation statements)

References 6 publications

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“…Polyphyly of Geophila-Geophila is a pantropical genus of about 24 species ( Piesschaert et al, 1998 ;Taylor et al, 2004 ;Dessein et al, 2011 ;Govaerts et al, 2013 ), which is characterized by creeping, stoloniferous, and herbaceous habit; cordate leaves; and red or black drupaceous fruits. Most species are found in tropical Africa and the neotropics; each region contains nine species.…”

Section: Generic Limits and Relationships Between And Within The Genementioning

confidence: 99%

“…140 species ( Bremekamp, 1962 ;Verdcourt, 1976Verdcourt, , 1983Piesschaert et al, 1999a , b ;Lachenaud and Harris, 2010 ;Lachenaud et al, 2012 ;Govaerts et al, 2013 ); the African Hymenocoleus Robbr. with 13 species ( Robbrecht, 1975( Robbrecht, , 1977; the pantropical Geophila D.Don with about 24 species (e.g., Bremekamp, 1963 ;Burger and Taylor, 1993 ;Dessein et al, 2011 ); and the pantropical Margaritopsis C.Wright (including the neotropical Chytropsia Bremek., the African Chazaliella E.M.A.Petit & Verdc., and the Fijian Readea Gillepsie) with about 80 species ( Andersson, 2002a ;Taylor, 2005 ;Barrabé et al, 2012 ). Palicoureeae sensu Robbrecht and Manen (2006) were supported by Barrabé et al (2012) based on sequence data from five gene regions.…”

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confidence: 99%

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Phylogeny and generic limits in the sister tribes Psychotrieae and Palicoureeae (Rubiaceae): Evolution of schizocarps in Psychotria and origins of bacterial leaf nodules of the Malagasy species

Razafimandimbison

Taylor

Wikström

et al. 2014

American J of Botany

148

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• Premise of the study: The pantropical, species-rich Psychotrieae and Palicoureeae are sister tribes of mostly drupe-bearing and nonbacterial leaf-nodulating species with problematic generic limits. This problem is more complicated in Psychotrieae due to the paraphyly of the genus Psychotria, the lack of diagnostic characters for some major lineages, and the poor sampling from some biodiversity hotspots. Schizocarps and bacterial leaf nodules have been used for recognizing formal groups in Psychotrieae, but their evolution and taxonomic value have not been studied using a robust phylogeny of the tribe.• Methods: We analyzed 287 samples from the entire ranges of the tribes, with particular emphasis on the Western Indian Ocean region, with the Bayesian Markov chain Monte Carlo method.• Key results: All allied Psychotria genera investigated are nested within a paraphyletic Psychotria. Schizocarps evolved independently two times within Psychotria, and one reversal back to the drupaceous condition is inferred. The Malagasy leaf-nodulated Psychotrieae (except Apomuria bullata) and the Comorian non-leaf-nodulated Psychotria conocarpa are nested within the (African) leaf-nodulated clade. Within Palicoureeae, Chassalia is paraphyletic with respect to Geophila sensu stricto, and the Malagasy Geophila gerrardii and the African Hymenocoleus are closely related.• Conclusions: A widely circumscribed Psychotria encompassing the entire Psychotrieae is supported. Within Psychotria, two separate origins of schizocarps from drupes, one reversal back to the drupaceous condition, and two independent origins of the Malagasy leaf-nodulated species are inferred. A new genus Puffia is described to accommodate Geophila gerrardii, and a narrow circumscription of Chassalia is adopted. Thirty-two new combinations, two lectotypifications, and 25 new names are presented.

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Section: Generic Limits and Relationships Between And Within The Genementioning

confidence: 99%

mentioning

confidence: 99%

Phylogeny and generic limits in the sister tribes Psychotrieae and Palicoureeae (Rubiaceae): Evolution of schizocarps in Psychotria and origins of bacterial leaf nodules of the Malagasy species

Razafimandimbison

Taylor

Wikström

et al. 2014

American J of Botany

148

View full text Add to dashboard Cite

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<I>Geophila erythrocarpa</I> (<I>Rubiaceae</I>), a new species from D.R. congo and Zambia

Cited by 1 publication

References 6 publications

Phylogeny and generic limits in the sister tribes Psychotrieae and Palicoureeae (Rubiaceae): Evolution of schizocarps in Psychotria and origins of bacterial leaf nodules of the Malagasy species

Phylogeny and generic limits in the sister tribes Psychotrieae and Palicoureeae (Rubiaceae): Evolution of schizocarps in Psychotria and origins of bacterial leaf nodules of the Malagasy species

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