Peltogyne paradoxa Ducke, Arch. Jard. Bot.

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 : 52-54

19. Peltogyne paradoxa Ducke, Arch. Jard. Bot. Rio de Janeiro 3: 95. 1922.

Type :— BRAZIL. Pará : Monte Alegre, Serra Itauajury, 26 August 1918, A Ducke s.n. MG! 17147 (Lectotype, designated by M. F. da Silva (1976) MG!; Isolectotypes: BM, P, RB!, US). Fig 24 .

Tree, 10 m tall, bark smooth, light yellow, branches smooth, striate, stipules early deciduous. Leaflets oblong, not falcate, 17 × 9 cm long, base rounded, apex obtuse, glabrous, with white wax on both surfaces, concolorous, petiole 21–23 mm long, petiolule 5–6 mm long, blade decurrent, pulvinus dilated, primary vein conspicuous and blackish abaxially, secondary veins conspicuous on both sides, glands absent. Inflorescence a panicle, terminal, laxiflorous, rachis velutinous, 13–15 cm long, inserted in a non-aphyllous branch. Pedicel 4–6 mm long, bracteoles caducous, hypanthium present, 3–4 × 4 mm, cylindrical. Bud 6–7 × 12 mm, sepals deltoid, outer side pubescent, inner side pubescent, margin glabrous, glands absent, petals elliptic to oblanceolate, unguiculate, glabrous, glands present. Stamens of different sizes, antesepalous filaments 9–11 mm long, antepetalous filaments 6–7 mm long. Stipe glabrous, 1–2 mm long. Ovary semicircular, commonly D-shaped, glabrous, sometimes with trichomes in the carpel cleft, 3(–4) mm long. Fruit a legume, dehiscent, orbicular, with a protuberance at the apex, compressed, 3.7 × 2 cm, stipitate, nectary disc not persistent, glabrous, glands absent, veins present, not winged.

Phenology —Collected in flower between October and November and in fruit between July and August.

Distribution and habitat— Peltogyne paradoxa is restricted to the state of Amapá and northern Pará, near igarapés or floodplains ( Fig 4 ).

Taxonomic comments —The diagnostic feature of this species is the leaflets covered in white wax. It is confused with P. densiflora and P. maranhensis due to the size of the buds, but is easily distinguished by the leaflets and fruits with a protuberance at the apex.

Etymology— paradoxa , paradoxical, alluding to the appearance (leaflets and fruits) that is unique among the other species.

Specimens examined — BRAZIL. Amapá: Macapá , 23 September 1962, J. M . Pires 52248 ( MG!); 15 December 1976, N. A . Rosa 1379 ( MG!); Perto de Ferreira Gomes , 29 August 1955, G. A . Black 18523 ( IAN!); Campo gerais, mata alta, 26 July 1951, R. L . Fróes 27712 ( IAN!); Mazagão, Ramal do Camaipi , Ramal do Camaipi , 26 November 1985, B. V . Rabelo 3263 ( INPA !); 28 November 1985, B. V . Rabelo 3273 ( INPA !); 28 November 1985, B. V . Rabelo 3276 ( INPA !); 29 November 1985, B. V . Rabelo 3283 ( INPA !); Pará: Almeirim , Serra do Jutaí , 1 September 1918, A . Ducke RB11024 ( MG!, RB!); 11 October 1919, A . Ducke IAN ! 050603 ( IAN!); Almeirim, Planalto A 12 Km , mata de terra firme, 04 June 1970, N. T . Silva 3184 ( IAN!); Estrada do Munguba, Km 15, mata de terra firme, 21 August 1970, N. T . Silva 3274 ( IAN!); Km 16, 17 September 1979, N. T . Silva 5127 ( MG!, INPA !); Monte Dourado, Rio Jarí , Planalto A , mata de terra firme, 05 October 1968, N. T . Silva 1115 ( IAN!); Serra Arumanduba, 26 August 1918, A . Ducke 17259 ( MG!, R); 26 August 1918, A . Ducke 17260 ( R, RB!); 01 September 1918, A . Ducke 17279 ( R); 28 September 1918, A . Ducke 17147 ( MG!, RB!); Altamira, Morro da velha Pobre, Altamira , 11 October 1919, A , Ducke RB11026 ( RB!) .

Digital images — BRAZIL. Amapá: J . M. Pires 52248 ( NY) ; N . T. da Silva 1115 ( NY); Camaipi, Embrapa reserve and vicinity, 12 October 1983 , S. A. Mori 16530 ( NY) .

Vernacular names —Coataquicauá. Em Santarém-PA, “Coração de Negro”.

Figures

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

FIGURE 24. Peltogyne paradoxa Ducke. A, branch with leaflets (scale: 10 cm). B, inflorescence (scale: 5 cm). C, flower bud in preanthesis (scale: 5 mm). D, petal (scale: 5 mm). E, stamens (scale: 5 mm). F, carpel (scale: 3 mm). G, fruit (scale: 2 cm). Illustrated by Fábio Júnior Kochanovski.