Crotalaria maypurensis Kunth (1824:403)

Flores, Andréia Silva & Tozzi, Ana Maria Goulart De Azevedo, 2018, A synopsis of the genus Crotalaria (Leguminosae) in Brazil, Phytotaxa 346 (1), pp. 31-58 : 43-45

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.

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).

Figures

FIGURE 7. Habit of (a) Crotalaria martiana subsp. martiana DC., (b) Crotalaria martiana subsp. mohlenbrockii (Windler & S.G. Skinner) Planchuelo, (c) Crotalaria maypurensis Kunth, (d) Crotalaria micans Link, (e) Crotalaria miottoae A.S. Flores & A.M.G. Azevedo, (f) Crotalaria otoptera Benth. Photos by A.S. Flores.