You selected Uncaria callophylla var. oligoneura Korth. ex Miq. This is a synonym for:

Accepted scientific name:
Uncaria longiflora var. longiflora (accepted name)
Synonyms:
Uncaria callophylla var. oligoneura Korth. ex Miq. (synonym) 1 literature reference for Uncaria callophylla var. oligoneura Korth. ex Miq.
Uncaria havilandiana S.Moore (synonym) 1 literature reference for Uncaria havilandiana S.Moore
Uncaria pachyphylla Merr. (synonym) 1 literature reference for Uncaria pachyphylla Merr.
Uncaria trinervis Havil. (synonym) 1 literature reference for Uncaria trinervis Havil.
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rubiales
Family Rubiaceae
Genus Uncaria
Species Uncaria longiflora
Distribution: Pen. Thailand to Papuasia
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=209837&repSynonym_id=-9998&name_id=209837&status=true
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:f64d4d1c-29c1-102b-9a4a-00304854f820:ac2010