title: Isertia
text: # Isertia
  
  Isertia is a genus of flowering plants in the family Rubiaceae. It contains 15 species of shrubs or small trees that are indigenous to the neotropics. A few are cultivated as ornamentals.
  
  ## Systematics
  
  Isertia was named by Johann von Schreber in 1789. The generic name honors the German botanist and explorer Paul Erdmann Isert.
  
  Isertia is divided into two sections: section Cassupa and section Isertia. In section Cassupa, the fruit is a berry and the ovary usually has two or three locules. In section Isertia, the fruit is a pyrene and the ovary usually has five or six locules.
  
  Molecular phylogenetic studies have shown that Isertia is most closely related to Kerianthera, a monospecific genus from Amazonian Brazil.
  
  ## Species
  
  * Isertia coccinea (Aubl.) J.F.Gmel.
  * Isertia haenkeana DC.
  * Isertia hypoleuca Benth.
  * Isertia krausei Standl.
  * Isertia laevis (Triana) B.M.Boom
  * Isertia longifolia (Hoffmanns. ex Schult.) K.Schum.
  * Isertia parviflora Vahl
  * Isertia pittieri (Standl.) Standl.
  * Isertia psammophila N.Dávila
  * Isertia reticulata Britton ex Rusby
  * Isertia rosea Spruce ex K.Schum.
  * Isertia scorpioides B.M.Boom
  * Isertia spiciformis DC.
  * Isertia verrucosa (Humb. & Bonpl.) Standl.
  * Isertia wilhelminensis Steyerm.
  