Bolivian Mimosa (Leguminosae, Mimosoideae): three new species and a species checklist Margoth Atahuachi M. Leontien Van Der Bent John R. I. Wood Gwilym P. Lewis Colin E. Hughes Phytotaxa 2016 2016-05-13 260 3 201 222 Spruce ex Benth Spruce ex Benth [199,619,1492,1519] Magnoliopsida Fabaceae Mimosa IPNI Plantae Fabales 15 216 Magnoliophyta species orthocarpa  The occurrence of  Mimosaorthocarpain Boliviarepresents a surprisingly large range extension for a species previously unrecorded from south of the Amazon and known to Barneby (1991)from the Amazon, northern South America and parts of CentralAmerica. Several collections ( J.R.I. Wood et al. 22861, LPB, K, USZ, J.R.I. Wood & D. Soto 27134, LPB, K, USZ and D. Villarroel et al. 2046, USZ) from two disjunct localities in Bolivia—ca. 50 kmS of Concepcion(Las Trancas and El Encanto), and Cerro Mutún, German Busch—can be attributed here.  Mimosaorthocarpais characteristic of granite rock platforms, particularly in the Lomerio area, a habitat also mentioned by Barneby (1991)in his notes on this species from northern South America. The species is morphologically close to and easily confused with M. tobatiensisBarneby & Fortunato, another species here newly documented for Bolivia(see below). These two species, distinguished by details of leaflet venation, indumentum, and pod shape ( M. orthocarpawith larger, more robust and almost linear pods cf. the slightly falcate chartaceous pods of M. tobatiensis) and previously considered to be remotely allopatric putative sister species ( Barneby 1991), are thus now known to co-occur in Bolivia.