A synopsis of the genus Crotalaria (Leguminosae) in Brazil Author Flores, Andréia Silva Instituto de Amparo à Ciência, Tecnologia e Inovação de Roraima, Herbário do Museu Integrado de Roraima, Av. Brigadeiro Eduardo Gomes s. n., Parque Anauá, 69305 - 010 Boa Vista, RR, Brazil Author Tozzi, Ana Maria Goulart De Azevedo Universidade Estadual de Campinas, Instituto de Biologia, Departamento de Botânica, CP 6109, CEP 13083 - 970, Campinas, São Paulo, Brazil. text Phytotaxa 2018 2018-03-29 346 1 31 58 http://dx.doi.org/10.11646/phytotaxa.346.1.2 journal article 10.11646/phytotaxa.346.1.2 1179-3163 13708620 20. Crotalaria maypurensis Kunth (1824:403) . ( Fig. 7c ). Type: — VENEZUELA . “Crescit in ripa Orinoci, prope Maypures,” undated, A.J.A. Bonpland & F.W.H.A. von Humboldt s.n. ( holotype : P 00660097 digital image!) Subshrub 70 cm high; branches puberulous; internodal stem wings absent. Leaves 3-foliolate, digitate, petioles 1.5–3 cm long; leaflets oblanceolate or linear, 2.5–6.5 × 0.3–1 cm , pubescent above and glabrous beneath; stipules 1–2 mm long, linear, caducous. Inflorescence a raceme, 8–23 cm long, terminal, lax; peduncles 3–4.5 cm long. Flowers 5–11, pedicels 4–8 mm long; bracts 1–4 mm long, subulate, straight, early caducous; bracteoles 3mm long, subulate, caducous; calyx 7–12 mm long, lobes twice or three times as long as the tube, pubescent; corolla yellow; the standard petal 1.3–1.7 × 1.2–1.6 cm , appendages extending to the claw; wing petals 1.5–1.7 cm long; keel petals 1.6–1.7 cm long, lanate on the upper margin, untwisted; ovary 5 mm long, stipitate; style curved. Legumes 2.8–3.5 × 0.7–1.3 cm , cylindrical, puberulous, brown at maturity, ca. 20-seeded; seeds 4–5 × 3 mm , seed coat brown. FIGURE 4. Habit of (a) Crotalaria martiana subsp. martiana Benth. (Irwin et al. 22820, UEC), (b) Crotalaria martiana subsp. mohlenbrockii (Windler & S.G. Skinner) Planchuelo (Flores et al. 880, UEC), (c) Crotalaria nitens Kunth (Cid & Lima 3267, MG), (d) Crotalaria otoptera Benth. (Flores & Rodrigues 1005, UEC). Scale bar: 5 cm. Distribution and Ecology: — Crotalaria maypurensis is native to Central and South America, known from México , Colombia , British Guiana , Venezuela , Peru , Brazil , Paraguay and Argentina ( Cuello 1999 ). It is widely distributed in Brazil , occurring mainly in cerrado areas. Selected material examined: — BRAZIL . Amazonas: Temendaui, 00º35’S 64º40’W , 30 June 1979 , Alencar 271 (MG). Bahia : Correntina, Chapadão Ocidental da Bahia . Alt. 600m . 44º43’S 13º29’W , 25 April 1980 , Harley 21734 (UEC). Goiás : Alto Paraíso, 500 m após a entrada para São Jorge, em direção a Colinas do Sul, 17 May 2002 , Flores & Schütz -Rodrigues 993 (UEC). Mato Grosso : Alto Paraguai, 01 April 1983 , Cunha et al. 834 ( CH ). Mato Grosso do Sul: Amambaí, arredores da tribo Caivá, 1979, Garcia 13902 (UEC). Minas Gerais: Itacambira, 16º 59’ 616”S, 43º 20’ 420”W, 13 November 2001 , Flores et al. 726 (UEC). Pará: Itaituba, Serra do Cachimbo, 9º22’S , 54º54’W , 26 April 1983 , Amaral 983 (INPA). Paraná: Campo Mourão, 8 December 1965 , Hatschbach et al. 13284 (MBM). Piauí: Piracuruca, Parque Nacional de Sete Cidades, 04 April 2002 , Flores et al. 934 (UEC). Roraima: Boa Vista, 09 November 1986 , Coelho 2206 (INPA). São Paulo: Águas de Santa Bárbara, Estação Ecológica de Santa Bárbara, 09 October 1990 , Meira Neto et al. 660 (UEC).