Acaciella is a Neotropical genus of flowering plants in the legume family, Fabaceae, and its subfamily Mimosoideae. Its centre of diversity is along the Mexican Pacific 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.
Species Acaciella angustissima (Mill.) Britton & Rose—Prairie acacia, Prairie wattle, Fern acacia var. angustissima (Mill.) Britton & Rose var. chisosiana —Chisos acacia, Chisos prairie acacia, Prairie acacia var. filicoides (Cav.) L. Rico var. hirta —Prairie acacia var. shrevei —Shreve's Prairie acacia var. suffrutescens —Prairie acacia var. texensis (Nutt. ex Torrey & A. Gray) L. Rico—Prairie wattle, Whiteball acacia Acaciella barrancana (H. Gentry) L. Rico Acaciella bicolor Britton & Rose Acaciella chamelensis (L. Rico) L. Rico Acaciella glauca (L.) L. Rico—Yellow tamarind acacia, (Jamaica) Yellow tamarind Acaciella goldmanii Britton & Rose Acaciella hartwegii (Benth.) Britton & Rose Acaciella igualensis Britton & Rose Acaciella lemmonii (Rose) L. Rico Acaciella painteri Britton & Rose var. houghii (Britton & Rose) L. Rico var. painteri Britton & Rose Acaciella rosei (Standl.) L. Rico Acaciella sotoi L. Rico Acaciella sousae (L. Rico) L. Rico Acaciella tequilana (S. Wats.) Britton & Rose var. crinita (Rose) L. Rico var. pubifoliolata L. Rico var. tequilana (S. Wats.) Britton & Rose Acaciella villosa (Sw.) Britton & Rose
References
Daniel J. Murphy (2008), A review of the classification of Acacia.