55. Mimosa xanthocentra Martius
Common, widespread and sometimes weedy with both the armed and unarmed subspecies known from Bolivia
subsp. xanthocentra var. xanthocentra
subsp. xanthocentra var. mansii (Mart.) Barneby
subsp. subsericea (Benth.) Barneby var. subsericea
* subsp. subsericea (Benth.) Barneby var. longepetiolata (Malme) Barneby This variety previously known only from Serra do Guimar„es in Brazil, but D. Villarroel et al. 2036 & 2041 (USZ) are both a good match for the description and perhaps to be expected as these are both from the most easterly outpost in Bolivia on Cerro Mutún.
Doubtful Species