Typification, Apocynaceae, Gentianaceae, Ridley, Henry Nicholas (1855-1956), Rubiaceae, Loganiaceae, Lectotype, and Gentianales

Indochina, Cambodia, New status, Endemism, New species, Vietnam, New subspecies, Gentianales, Lectotypificiation, Identification key, Understorey plants, and Urophylleae