Scanning electron microscopy revealed the presence of stipular
colleters on Morinda citrifolia stipule adaxial surface.
The genus Vachellia, which includes species of Acacia sensu lato with paired stipular
spines, consists of 60 species in the New World tropical and subtropical areas ranging from southern United States south to Argentina (Seigler and Ebinger, 2005).
Irvingia gabonesis (ogbono) is a wild seed bearing many fruit plant that grows to a height of 15-40m and has a dense, compact crown, branchlets ending in narrow, curved stipular
sheath covering the leaf bud.
faginea, but differs by the number of buds on branch apices, stipular
shape, petiolar surface, inflorescence length and position, stylar branching, and fruit peduncle and spines.