Peltogyne catingae Ducke, Trop. Woods

Kochanovski, Fabio J., Nogueira, Luan H. P., Rosa, Marcus P. G., Mansano, Vidal F. & Sartori, Ângela L. B., 2025, Taxonomic review of the genus Peltogyne Vogel (Leguminosae, Detarioideae), Phytotaxa 688 (1), pp. 1-68 : 18-21

5. Peltogyne catingae Ducke, Trop. Woods 31: 13. 1932.

Holotype:— BRAZIL. Amazonas : Camanaós, alto Rio Negro, “caatinga”, 30 November 1929, A. Ducke RB23277 (Holotype: RB!; Isotypes: K, P, U, US). Fig 10 .

Tree or treelet, 15–20 m tall, bark smooth, thin, greyish, branches strongly rough, greyish, but blackish at the apex, stipules early deciduous. Leaflets elliptic–obovate (sometimes elliptic – oblong), not falcate, 9–18 x 5–6 cm, base rounded, apex acute, glabrous, wax absent on both surfaces, concolorous, petiole (7–) 18–25 mm long, petiolule (4–) 8– 10 mm long, blade not decurrent, pulvinus dilated, primary vein conspicuous abaxially, secondary veins conspicuous on both sides, glands absent. Inflorescence a panicle, terminal or subterminal, densiflorous, rachis glabrous, 13–17 cm long, inserted in a non aphyllous branch. Pedicel 2–5 mm long, bracteoles persistente, pilose, hypanth present, 5–7 x 3– 4 mm, obconic. Bud 5–7 x 9–10 mm, sepals subtriangular, outer side tomentose, inner side pubescent, margin glabrous, glands not observed, petals oblanceolate to linear, unguiculate, glabrous, glands present. Stamens of different sizes, antesepalous filaments 5–13 mm long, antepetalous filaments 2–7 mm long. Stipe glabrous with sparse trichomes, 1–2 mm long. Ovary semicircular, commonly D-shaped, glabrous, with sparse trichomes, 2–3 mm long, style with terminal insertion, 10–17 mm long. Fruit a legume, indehiscent, orbicular, without a protuberance, compressed, 3.5–4 x 2.8–3 cm long, stipitate, nectary disc not persistent, glabrous, glands absent, veins present, winged.

Phenology —Collected in flower from November to March and in fruit in May.

Distribution and habitat— Peltogyne catingae is restricted to the state of Amazonas, found on the banks of the Içana River, in the Upper Rio Negro region, frequently around Manaus and on the banks of the highway between Manaus and Boa Vista ( Fig 4 ).

Taxonomic comments— Peltogyne catingae is not found in the Caatinga in Northeast Brazil, but in Amazonian capinaranas (humid scrub forests), in sandy soils, and eventually in forests. P. catingae has leaflets with an acute to acuminate apex, a dilated pulvinus, and a non-decurrent blade. Sometimes it is confused with P. campestris , a species that occur in open environments, especially in Ducke resevoir. However, P. campestris has leaflets with an obtuse or rounded apex, a non-dilated pulvinus and a decurrent blade. When Ducke (1915) described P. campestris , he segregated the taxon into two subspecies based on the presence of trichomes on the inflorescences and bracteoles: P. catingae subsp. catingae and P. catingae subsp. glabra . However, in our analyses, we did not find bracteoles with a totally glabrous surface, but rather bracteoles with a few trichomes. This variation in the trichomes may be related to the water regime and temperature of the environment ( Sandquist et al. 1997), as observed in the leaflets of P. pauciflora and P. paniculata .

Etymology— catingae , a common tree in the caatingas of the Amazon.

Specimens examined — BRAZIL.Amazonas: 19 November 1936, A. Ducke R 54566 ( R); 1948, R. E. Schultes 9517 ( IAN!); Rio Negro, Catingas dos arredores de Camanáos, 30 November 1929, A. Ducke RB 23277, RB 23278, RB 23277 ( RB!); Manaus, Estrada Manaus-Porto Velho km 310, 17 June 1975, W. Rodrigues 9613 ( RB!); Distrito Agropecuário, ZF3, Reserva 1501, Km 41, of the WWF INPA ! MCS Project, 19 November 1988 B. M. Boom 8556 ( INPA !); 27 November 1988, B. M. Boom 8668 ( INPA !); EEST, ZF- 2, B 2- SB 2, Pique 1, J. A. Souza INPA 150960 ( INPA !); Estação Experimental de Silvicultura Tropical - ZF2, 01 February 1997, M. C. Lemos 148 ( INPA !); Km 69 da estrada Manaus-Itacoatiara, Km 69 da estrada Manaus-Itacoatiara, 08 September 1960 W. A. Rodrigues 1724 ( INPA !); Km 70 da BR 17, 17 May 1961, W. A. Rodrigues 2612 ( INPA !); 08 October 1964, A. A. Loureiro INPA 3023 ( INPA !); 11 July 2014, Dexter 7095 ( RB!); 26 June 2014, Dexter 6894 ( RB!); Reserva Florestal Adolpho Ducke, Estrada Manaus-Itacoatiara, Km 26, 26 February 1976, F. C. de Mello INPA 55254 ( INPA !); 11 March 1976, F. C. de Mello INPA 55347 ( INPA !); 27 February 1976, F. C. de Mello INPA 55262 ( INPA !); 27 February 1976, F. C. de Mello INPA 55266 ( INPA !); 10 March 1976, L. Q. Reis INPA 55706 ( INPA !); M. da Silva 1848, ( INPA !); 22 September 1994, A. Vicentini 721 ( INPA !, SP!, HSTM!, RB!, MG!); 13 August 1997, L. H. P. Martins 35 ( INPA !); M. F. da Silva 1845 ( INPA !); 01 March 1966, W. A. Rodrigues 8183 ( INPA !); 26 May 1966, W. A. Rodrigues 7872 ( INPA !); M. da Silva 1847 ( INPA !); 25 May 1966, W. A. Rodrigues 7867 ( INPA !); M. F. da Silva 1846 ( INPA !); Terreno da SIDERAMA, 08 May 1973, A. A. Loureiro INPA 38033 ( INPA !); Vicinal de origem no Km 50 da Rodovia BR-174, June 2012, T.D. Gaui 181 ( INPA !); June 2012, T.D. Gaui 182 ( INPA !); Rio Preto da Eva, AM 10, Km 66, Estrada Manaus-Itacoatiara, Km 66, 31 August 1965, W. A. Rodrigues 7061 ( INPA !); 10 September 1965, W. A. Rodrigues 7663 ( INPA !); São Gabriel da Cachoeira, Alto Rio Negro, estrada para Camanáos, logo após o entroncamento da estrada para o Aeroporto, 24 November 1987, H. C. de Lima 3282 ( INPA !, RB!); Road Camanaus-Uaupés, near Camanáos, 02 November 1971, G. T. Prance 15997 ( INPA !); Rio Tuari, afluente da margem direita do rio Negro, Piraianara, 13 November 1987, H. C. de Lima 3189 ( RB!, INPA !); 17 November 1987, H. C. de Lima 3224 ( INPA !); 04 April 2008, L. A. G. de Souza 9_08 ( INPA !); Morro dos 6 Lagos, Lago da Pata, 06 October 1991, A. Knob 1081 ( INPA !).

Digital images — BRAZIL. Amazonas: Alto Rio Negro , estrada para Camanaús, logo após o entroncamento da estrada para o Aeroporto, 24 November 1987, H. C . de Lima 3282 ( NY); Alto Rio Negro, Rio Tuarí, afluente do Rio Negro , Piraiauara, 13 November 1987, H. C . de Lima 3189 ( NY); Basin of Rio Negro , road Camanaus-Uaupés, near Camanaus, 02 November 1971, G. T . Prance 15997 ( K); Distrito Agropecuário, Reserva 1501, Km 41 of the WWF / INPA !, 27 November 1988, B. M . Boom 8668 ( NY); Reserva Florestal Ducke, Manaus-Itacoatiara, km 26, Margem igarapé do Acará, a montante do acampamento, 22 September 1994, A . Vicentini 721 ( K); Margem do Igarapé do Acará , a montante do acampamento, 22 September 1994, A . Vicentini 721 ( NY); Km 69 da estrada Manaus-Itacoatiara, 08 September 1960, W. A . Rodrigues 1724 ( NY); Próximo à trilha principal da área 7. Planta fichada: 4694-07. INPA ! n: 191382, 13 August 1997, L. H. P . Martins 35 ( K); Rio Curicuriary affl. rio Negro , 19 November 1936, C. L . Hitchcock 329 ( K); São Gabriel da Cachoeira, Upper Rio Negro, Morro dos Seis Lagos , 15 October 1987 D. C . Daly 5430 ( K); B. M . Boom 8556 ( NY); C. A . Mackenzie NY01135687 ( NY): Morro dos Seis Lagos , 30 September 1990, B. W . Nelson 2188 ( MO); R . de Lemos Fróes 21321 ( NY); W. A . Ducke 329, ( NY); 30 September 1990, B. W . Nelson 2624 ( MO); B. W . Nelson 2302, 30 September 1990 ( MO); 15 October 1987, D. C . Daly 5430 ( NY); Rio Curicuriary Negro , “”catinga”” ad ripas cataractae cuina, 19 November 1936, A . Ducke 329 ( MO); Rio Içana, próximo a Serra do Grilo , 05 November 1987, C . Farney 1898 ( NY); Road Camanaus-Uaupés , near Camanaus, 02 November 1971, G. T . Prance 15997 ( NY); Rio Mapuera margem esquerda, campina das 3 Ilhas a 4 Km da margem do rio, 19 August 1986, C. A. C . Ferreira 7805 ( NY); Rondônia: Área do reservatório da Usina Hidrelétrica de Samuel , próximo ao igarapé Japiim, 18 June 1986, C. A. C . Ferreira 7488 ( NY); Área do reservatório da Usina Hidrelétrica de Samuel , próximo ao igarapé Japiim, 18 June 1986, C. A. C . Ferreira 7488 ( NY); Campina do alojamento, margem da BR-174, alguns km ao N da linha do Equador, 06 August 2000, A . Vicentini 1726 ( MO) .

Vernacular names —Pau-roxo-da-caatinga, Japurarana.

Figures

FIGURE 4. Distribution map of Peltogyne species in floodplains, next to river courses or flooding areas in the Amazon.

FIGURE 10. Peltogyne catingae Ducke. A, branch with leaflets, and inflorescence (scale: 5 cm). B, flower bud in pre-anthesis (scale: 10 mm). C, fruit (scale: 2 cm). Illustrated by Fábio Júnior Kochanovski.