Peltogyne barbata Kochan. & Mansano, Kew Bull.

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 : 14-16

3. Peltogyne barbata Kochan. & Mansano, Kew Bull. 75(1)-6: 1. 2020.

Holotype:— BRAZIL. Pará: Oriximiná, Porto Trombetas, Macaxeira Lake , 7 July 1980, G. M. Martinelli 7280 (Holotype: RB!; Isotypes: INPA !; K; HUEFS; MBM; MG!; MO; NY; SPF; UEC!). Fig 8 .

Shrub, 3–5 m tall, bark smooth, grayish, branches lenticellate, scaly, stipules early deciduous. Leaflets elliptic-lanceolate, not falcate, 9–11 × 4–6 cm, base rounded, apex acute, glabrous, glossy on the adaxial surface, wax absent on both surfaces, discolorous, petiole 20–25 mm long, petiolule 4–5 mm long, blade decurrent, pulvinus dilated, primary vein inconspicuous adaxially and conspicuous abaxially, secondary veins conspicuous on both sides, glands present. Inflorescence a panicle, terminal, densiflorous, rachis velutinous, 11–18 cm long, inserted in a non-aphyllous branch. Pedicel 2–5 mm, bracteoles caducous (sometimes present until the intermediate stage), hypanthium present, 3 × 4 mm, cylindrical. Bud 5–7 × 8–15 mm, sepals deltoid to subtriangular, outer side tomentose, inner side pubescent, margin glabrous, glands present, petals oblanceolate, unguiculate, glabrous, glands present. Stamens of different sizes, antesepalous filaments 24 mm, antepetalous filaments 22 mm. Stipe glabrous, 2 mm long. Ovary semicircular, tomentose except in the carpel cleft region, 4 mm long, style with subterminal insertion, 10–24 mm long. Fruit a legume, indehiscent, orbicular (slightly subtriangular), without a protuberance, compressed, 2.5 × 2.2 cm, stipitate, nectary disc not persistent, hairy, glands present, veins present, winged.

Phenology —Collected in flower from March to June and in fruit from August to December.

Distribution and habitat— Peltogyne barbata is endemic to the Trombetas River in the state of Pará, in bauxiterich soils ( Fig 4 ).

Taxonomic comments— Peltogyne barbata is distinguished by its gray stem and slender branches, an ovary that is generally tomentose but glabrous in the carpel cleft region, and the sepals that are adaxially as purple as the petals. The fertile branches sometimes have leaflets along the inflorescence axis, and these become hairy after anthesis. P. barbata resembles P. densiflora mainly because of the shape of the fruit, the elliptic-lanceolate leaflets, and the prolate bud, inflated hypanthium, and because of their overlapping geographic distribution. However, P. barbata has smooth, grayish bark with scaly branches, non-falcate leaflets, and glands, while P. densiflora has scaly, brown bark with striate branches, falcate leaflets, and no glands.

Etymology —The specific epithet barbata is an allusion to the presence of trichomes only on the abaxial region of the carpel.

Specimens examined — BRAZIL. PARÁ : Oriximiná, District of Porto Trombetas , Basin of Rio Trombetas 20 km up Rio Mapueira from Cachoeira Porteira on east bank, 31 May 1974, D. G . Campbell P22410 ( INPA !) ; 4 Km south of Cachoeira Porteira , 06 June 1974, D. G . Campbell P22527 ( INPA !, NY) ; Erepecú Lake , Reserva Biológica do IBDF , 10 July 1980, G. M . Martinelli 7372 ( INPA !, UEC, NY, HUEFS); Erepecu Lake , ao longo do lago, 16 July 1980, C. A. C . Ferreira 1530 ( INPA !, NY, MO, US); Batata Lake , North of Porto Trombetas, 24 July 1980, C. A. C . Ferreira 1781 ( INPA !, MG! NY, US); Batata Lake , area flooded by bauxite, near the Igarapé Caranã, 07 August 1986, E . Soares 182 ( INPA !); near of Porteira Falls , margin of Tapagem Lake, 23 August 1986, C. A. C . Ferreira 8008 ( INPA ! MG! MIRR, MO, NY, US); Batata Lake , Porto Trombetas, 02 June 2017, FJ. Kochanovski et al. 738 ( UEC, RB!, NY, CGMS); near to Moura Lake, 04 June 2017, F. J . Kochanovski et al. 740 ( UEC, RB!, NY, CGMS); Mineração Rio do Norte , Lago do Batata. Floresta de Igapó, 12 June 1989, E . Soares HSTM6137 ( HSTM!); Lago do Batata , próximo ao Igarapé do Caranã. Mata de igapó, área invadida pela bauxita, 07 August 1986, E . Soares HSTM6134 ( HSTM!); Rio Trombetas , Rio Trombetas, margem esquerda do lago Erepecu, ao longo do lago, 16 July 1980, C. A. C . Ferreira et al. 1530 ( INPA ! NY, US); Cachoeira da Porteira , estrada, 27 May 1999, S. M . Faria 1722 ( HSTM!); Rio Mapuera , Três Ilhas. Campina, solo arenoso, 27 May 1999, H. C . Lima 5661 ( HSTM!); Rio mapuera, três ilhas, 27 May 1999, H. C . Lima 5662 ( HSTM!); Lago Batata , Porto Trombetas, 02 June 2017, F. J . Kochanovski et al. 735 ( UEC) .

Digital images — BRAZIL. Pará: Rio Trombetas , a jusante de Cach. Porteira. Margem do Lago Tapagem, 23 August 1986, C. A. C .Ferreira 8008 ( NY).

Vernacular names —Coaticoaraci.

Figures

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

FIGURE 8. Peltogyne barbata Kochan. & Mansano. A, flower in anthesis (scale: 20 mm). B, pubescent ovary (scale: 10 mm), detail of glabrous carpel cleft. C, fruit (scale: 3 cm), outer part, subtriangular shape. D, branch with bifoliolate compound leaves (scale: 5 cm). E, leaflets (scale: 5 cm). Illustrated by Fábio Júnior Kochanovski.