Abstract
Summary. Two new species, Mimosa myrioglandulosa V. F. Dutra & F. C. P. Garcia and M. trinerva V. F. Dutra & F. C. P. Garcia, and one new variety M. foliolosa Benth. var. grandibractea V. F. Dutra & F. C. P. Garcia, of Mimosa sect. Habbasia (Leguminosae, Mimosoideae) from the rocky fields of the state of Minas Gerais, Brazil, are described and illustrated. M. myrioglandulosa resembles M. maguirei Barneby, but differs because it has stems with sessile glands. M. trinerva is vegetatively similar to M. albolanata Taub. var. paucipinna (Benth.) Barneby, but has corolla lobes with 2 – 3 nerves. M. foliolosa var. grandibractea is similar to M. foliolosa var. brevibractea Barneby, but has larger bracts. Discussions about the distribution, habitat, phenology, conservation status, etymology, similar species and an analytical key to morphologically related species are provided.
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