Costa Rica
According to “American species of Acacia by Lourdes Rico (2007) there are the following species of Acacia s.l. to be found in Costa Rica:
with thorns
Myrmecophilous, spicate inflorescence
Vachellia collinsii (see also Yucatan)
Vachellia cornigera
Vachellia hindsii
Myrmecophilous, capitate inflorescence
Vachellia allenii
Vachellia cookii
Vachellia ruddiae
Non myrmecophilous
Vachellia macracantha
Vachellia farnesiana var. guanacastensis
with prickles
capitate inflorescence
Senegalia polyphylla
Senegalia riparia
Senegalia tenuifolia
with spicate inflorescence
Senegalia hayesii
as well as two Acaciella species
Acaciella angustissima and Acaciella villosa
In gardens you will also find some of the Australian phyllodineous Acacias.