A new species of Inga Mill. (Fabaceae, Mimosoideae) from the Guianas

Some specimens belonging to the genus Inga Mill., collected as part of tree inventories carried on by the forest departments of former British Guiana (Guyana) and French Guiana in the 1950’s, remained unidentified. The more recent discovery of flowering materials brought evidence for them to represent an undescribed species, closely related to Inga paraensis Ducke. It differs from the latter by its smaller flowers and by its larger pod exhibiting ligneous, thickened sutures, undulating around seeds. Following the description, the morphological variation shown by a set of specimens listed separately is discussed.