Plagiosiphon

{{Short description|Genus of legumes}}

{{Automatic taxobox

|image =

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|display_parents = 2

|taxon = Plagiosiphon

|authority = Harms (1897)

|synonyms = Tripetalanthus A.Chev. (1946)

}}

Plagiosiphon is a genus of plants in the family Fabaceae. It includes five species of trees or shrubs native to west and west-central Africa. They grow in tropical lowland Guineo-Congolian rain forest, often along rivers, on rocky banks, or on hillsides. Four species are limited to Cameroon, Gabon, and Republic of the Congo in west-central Africa. Plagiosiphon emarginatus also grows in Guinea, Sierra Leone, Liberia, and Côte d'Ivoire in West Africa.

Species accepted by the Plants of the World Online as of September 2023:

• Plagiosiphon discifer {{small|Harms}}
• Plagiosiphon emarginatus {{small|(Hutch. & Dalziel) J.Léonard}}
• Plagiosiphon gabonensis {{small|(A.Chev.) J.Léonard}}
• Plagiosiphon longitubus {{small|(Harms) J.Léonard}}
• Plagiosiphon multijugus {{small|(Harms) J.Léonard}}