You selected Hedyotis laxiflora (Benth.) Walp. This is a synonym for:

Accepted scientific name:
Pentodon pentandrus var. pentandrus (accepted name)
Synonyms:
Hedyotis halei Torr. & A.Gray (synonym) 1 literature reference for Hedyotis halei Torr. & A.Gray
Hedyotis laxiflora (Benth.) Walp. (synonym) 1 literature reference for Hedyotis laxiflora (Benth.) Walp.
Hedyotis macrophylla Lepr. & Perrott ex DC. (synonym) 1 literature reference for Hedyotis macrophylla Lepr. & Perrott ex DC.
Oldenlandia halaei A.Wood (synonym) 1 literature reference for Oldenlandia halaei A.Wood
Oldenlandia halei (Torr. & A.Gray) Chapm. (synonym) 1 literature reference for Oldenlandia halei (Torr. & A.Gray) Chapm.
Oldenlandia laxiflora Benth. (synonym) 1 literature reference for Oldenlandia laxiflora Benth.
Oldenlandia macrophylla DC. (synonym) 1 literature reference for Oldenlandia macrophylla DC.
Oldenlandia succulenta C.Wright ex Griseb. (synonym) 1 literature reference for Oldenlandia succulenta C.Wright ex Griseb.
Pentas thonningii Walp. (synonym) 1 literature reference for Pentas thonningii Walp.
Pentodon abyssinicus Hochst. (synonym) 1 literature reference for Pentodon abyssinicus Hochst.
Pentodon halei (Torr. & A.Gray) A.Gray (synonym) 1 literature reference for Pentodon halei (Torr. & A.Gray) A.Gray
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rubiales
Family Rubiaceae
Genus Pentodon
Species Pentodon pentandrus
Distribution: Africa, Arabian Pen., W. Indian Ocean. naturalised in America
Additional data: -
Source database: World Checklist of Selected Plant Families, 27 Nov 2009
Latest taxonomic scrutiny: Govaerts R., 11-Nov-2003
Online resource: http://apps.kew.org/wcsp/namedetail.do?accepted_id=150091&repSynonym_id=-9998&name_id=150091&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:f66e2c80-29c1-102b-9a4a-00304854f820:ac2010