Taxonomic Revision of the Ant-Acacias (Fabaceae, Mimosoideae, Acacia, Series Gummiferae) of the New World Author David S. Seigler Author John E. Ebinger text Annals of the Missouri Botanical Garden 1995 82 117 138 http://www.jstor.org/stable/2399983 journal article antacacia2399983 http://dx.doi.org/10.2307/2399983 Acacia cornigera x A. sphaerocephala . Janzen (1974) reported seeing a single plant of this hybrid on the dimes south of the city of Veracruz, Mexico. No specimen was cited, and none were located during this study. These species are similar morphologically, and it is probable that they hybridize.