Acaciella�is a�Neotropical�genus of�flowering plants�in the�legume�family,�Fabaceae, and its subfamily�Mimosoideae. Its�centre of diversity�is along the�MexicanPacific coast. They are unarmed, have no�extrafloral nectaries�and the polyads of their�pollen�are 8-celled.�Though its numerous free stamens (sometimes >300) is typical of�Acacia s.l., it has several characteristics in common with genus�Piptadenia�(tribe�Mimoseae). Its pollen and free�amino acids�resemble that of�Senegalia. Molecular studies place it sister to a�monophyletic�clade comprising elements of genus�Acacia, and the tribe�Ingeae.A nectary ring is present between the stamens and ovary, in common with�Acacia�subg.�Aculeiferum.