Quina

Antirhea is a genus of flowering plants in the family Rubiaceae.^[1]

Species

As of March 2023, Plants of the World Online accepted the following species:^[1]

• Antirhea bifida (Lam.) I.M.Johnst.
• Antirhea bifurcata (Desr.) Benth. & Hook.f.
• Antirhea borbonica J.F.Gmel.
• Antirhea madagascariensis Chaw

Many species are now placed in the genus Stenostomum, including:

• Antirhea aromatica → Stenostomum aromaticum
• Antirhea jamaicensis → Stenostomum jamaicense
• Antirhea portoricensis → Stenostomum portoricense
• Antirhea radiata → Stenostomum radiatum
• Antirhea sintenisii → Stenostomum sintenisii
• Antirhea tomentosa → Stenostomum tomentosum

Distribution

Species of Antirhea are native to Indian Ocean islands off Africa: Madagascar, Mauritius, Réunion, and Rodrigues.^[1]

References