A New Species of Eriosema (Leguminosae, Papilionoideae, Phaseoleae) from Minas Gerais, Brazil Author Cândido, Elisa S. Departamento de Biodiversidade, Evolução e Meio Ambiente, ICEB, Universidade Federal de Ouro Preto. Campus Morro do Cruzeiro s. n., Bauxita. Ouro Preto, MG, 35400 - 000, Brasil. Author Fortuna-Perez, Ana Paula Departamento de Biodiversidade, Evolução e Meio Ambiente, ICEB, Universidade Federal de Ouro Preto. Campus Morro do Cruzeiro s. n., Bauxita. Ouro Preto, MG, 35400 - 000, Brasil. & Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas. Rua Monteiro Lobato 255, Cidade Universitária Zeferino Vaz, Barão Geraldo. Campinas, SP 13083 - 862, Brasil. Author Bezerra, Luísa M. P. A. Departamento de Biodiversidade, Evolução e Meio Ambiente, ICEB, Universidade Federal de Ouro Preto. Campus Morro do Cruzeiro s. n., Bauxita. Ouro Preto, MG, 35400 - 000, Brasil. Author Aranha Filho, João Luiz M. Departamento de Biodiversidade, Evolução e Meio Ambiente, ICEB, Universidade Federal de Ouro Preto. Campus Morro do Cruzeiro s. n., Bauxita. Ouro Preto, MG, 35400 - 000, Brasil. & Setor de Vigilância Epidemiológica e Zoonoses, Secretaria Municipal de Saúde, Prefeitura Municipal de Mariana. Rua Dinamarca 37, Fonte da Saudade, Mariana, MG 35420 - 000, Brasil text Phytotaxa 2014 2014-09-17 178 3 229 232 http://dx.doi.org/10.11646/phytotaxa.178.3.11 journal article 10.11646/phytotaxa.178.3.11 1179-3163 5145516 Key to the species of Eriosema in Minas Gerais , Brazil 1 Leaves unifoliolate ........................................................................................................................................................................... 2 - Leaves usually trifoliolate, but sometimes the basal ones unifoliolate ............................................................................................. 7 2 Stipules free, leaflets obovate ............................................................................................................................ E. obovatum Benth. - Stipules fully or partially fused, leaflets linear, lanceolate, elliptical and ovate .............................................................................. 3 3 Leaflets linear, base acute, with the appearance of a rigid stick................................................................... E. stenophyllum Harms - Leaflets mostly ovate to lanceolate, base obtuse to cordate, never with the appearance of a rigid stick.......................................... 4 4 Stipules deciduous; leaflets conspicuously variable in size on the same plant ........................... E. benthamianum Mart. ex Benth. - Stipules persistent; leaflets uniform in size on the same plant ..........................................................................................................5 5 Subshrubs erect or ascending; stems usually glabrous or glabrescent; leaflets coriaceous; inflorescence densely white-sericeous (rarely pubescent) ................................................................................................................................................. E. rigidum Benth. - Subshrubs prostrate, rarely erect; stems pubescent; leaflets membranaceous to slightly coriaceous; inflorescences glabrescent to pubescent ........................................................................................................................................................................................... 6 6 Racemes with 8–15 flowers, usually longer than mature leaves................................................................. E. heterophyllum Benth. - Racemes with 2–10 flowers, usually shorter than mature leaves...................................................... E. simplicifolium (DC.) G.Don 7 Fully developed racemes longer than adjacent leaves .......................................................................................................................8 - Fully developed racemes shorter than adjacent leaves.....................................................................................................................14 8 Stems glabrous or glabrescent; leaflets with three veins clearly marked................................................ E. glabrum Mart. ex Benth. - Stems pubescent; leaflets without clearly marked veins ................................................................................................................... 9 9 Stems procumbent ...........................................................................................................................................................................10 - Stems erects or ascending ................................................................................................................................................................11 10 Leaflets membranaceous, base acute, stems copiously hirsute .......................................................................... E. prorepens Benth. - Leaflets thin-coriaceous, base obtuse or subcordate (rare acute), stems sparsely pilose ...................................... E. glaziovii Harms 11 Plants with caducous leaves (or nearly so) when fertile..................................................................................... E. defoliatum Benth. - Plants with persistent leaves when fertile.........................................................................................................................................12 12 Flowers 10–15 mm long ..................................................................................................................................................... E. tozziae - Flowers 21–30 mm long...................................................................................................................................................................13 13 Leaflets obovate, silvery-pilose on the abaxial surface, contrasting with rufous-pubescent veins, base acute or obtuse.................... .................................................................................................................................................................................. E. riedelli Benth. - Leaflets elliptic, rufous-pubescent on the abaxial surface, not contrasting with the veins, base mostly cordate ................................ ......................................................................................................................................................................... E. longiflorum Benth. 14 Leaflets usually less than five times longer than wide.....................................................................................................................15 - Leaflets usually more than five times longer than wide...................................................................................................................20 15 Stems glabrescent or cinereous to whitish pubescent.......................................................................................................................16 - Stems yellowish, rufous- or ferrugineous-pubescent .......................................................................................................................18 16 Plants with leaves only near the branch apex at anthesis .................................................. E. hatschbachii Fort. -Perez & G.P.Lewis - Plants with scattered leaves throughout the branch length or leaves caducous at anthesis..............................................................17 17 Stipules caducous; leaves caducous at anthesis................................................................................................. E. congestum Benth. - Stipules persistent; leaves persistent at anthesis............................................................................................. E. floribundum Benth. 18 Leaflets oblong-lanceolate with parallel secondary veins.............................................................................. E. pycnanthum Benth. - Leaflets ovate, obovate, elliptic to orbicular, without parallel secondary veins...............................................................................19 19. Plants erect, densely rufous-pilose or ferrugineous-pubescent .................................................................. E. rufum (Kunth) G.Don - Plants prostrate, yellow-pubescent .................................................................................................................... E. campestre Benth. 20 Leaflets elliptic to narrowly elliptic, the standard with a retuse apex ................................................. E. tacuaremboense Arechav. - Leaflets linear, lanceolate or rarely narrowly elliptic; the standard with an apiculate apex ............................................................21 21 Stems whitish to cinereous-pubescent................................................................................................................... E. strictum Benth. - Stems ferrugineous or rufous-pubescent ..........................................................................................................................................22 22 Racemes with 4–5 flowers .................................................................................................................... E. crinitum (Kunth) G.Don - Racemes with more than 8 flowers ................................................................................................................ E. longifolium Benth.