Peltogyne subsessilis W.A.Rodrigues, Acta Amazonica

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 : 62-64

24. Peltogyne subsessilis W.A.Rodrigues, Acta Amazonica 4(3): 7. 1974

Holotype:— BRAZIL. Amazonas: Manaus, 15 February 1971, L. Coêlho & D. Coêlho 95 (Holotype: INPA ! ( INPA 28480); Paratypes: INPA ! ( INPA 15713, INPA 18595). Fig 29 .

Tree, 16 m tall, bark smooth, yellowish, branches smooth, lenticellate, stipules early deciduous. Leaflets elliptic, not falcate, 5 × 2.5 cm, base rounded, apex acute, caudate, glabrous, wax absent on both surfaces, discolorous, petiole 17–23 mm long, petiolule 3–4 mm long, blade not decurrent, pulvinus not dilated, primary vein inconspicuous adaxially and conspicuous abaxially, secondary veins conspicuous on both sides, glands present. Inflorescence a panicle, terminal, sometimes axillary, laxiflorous, rachis pubescent, 9–13 cm long, inserted in a non-aphyllous branch. Pedicel 1 mm long, bracteoles caducous, hypanthium absent. Bud 3 × 3 mm, sepals orbicular, outer side pubescent, inner side glabrous, glands present, petals elliptic, sessile, glabrous, glands present. Stamens of different sizes, antesepalous filaments 2 mm long, antepetalous filaments 1 mm long. Stipe glabrous except on the abaxial side, 1 mm long. Ovary elliptic to rhombic, glabrous, 1.5–2 mm long. Fruit a legume, dehiscent, orbicular, without a protuberance, inflated, inflatedcompressed, 3 × 2.4 cm, sessile, nectary disc not persistent, glabrous, glands present, veins absent, not winged.

Phenology —Collected in flower from November to February and in fruit from April to December.

Distribution and habitat— Peltogyne subsessilis is only found in the Floresta Nacional do Jamari in Rondônia and on the highway between Manaus and Itacoatiara in Amazonas ( Fig 5 ).

Taxonomic comments— Peltogyne subsessilis has leaves with rounded base, long petioles (17–23 mm), petals with glands, and a glabrous ovary. It is sometimes confused with P. heterophylla due to the shape of the leaflets and the orbicular buds with short pedicels. However, P. heterophylla has leaflets with an attenuate base, a short petiole (5–7 mm), petals without glands, and a pubescent ovary. Among the Amazonian species, P. subsessilis has inflatedcompressed fruits as a diagnostic character, which differentiates it from the other species, except for P. recifenses . Peltogyne subsessilis can be distinguished from P. recifensis based on its leaflets with a non-decurrent blade, non-dilated pulvinus, and sessile fruits, while P. recifensis has leaflets with a decurrent blade, dilated pulvinus, and fruits with a short stipe.

Etimology—sub, a little; sessilis, sessile, referring the very short pedicel.

Specimens examined — BRAZIL. Amazonas : BR 319 , estrada Manaus-Porto Velho, Km 310, 17 April 1976, O. P . Monteiro 76-734 ( INPA !); BR-319, estrada Manaus-Porto Velho , Km 515, 24 April 1976, O. P . Monteiro 76-928 ( INPA !); Coari, Coletada na estrada do SUC, na Base petrolífera, 16 August 2009, L. A. G . de Souza 40_10 ( INPA !); Manaus, Manaus-Caracaraí km 28, Road Manaus-Caracaraí, km 28, 10 November 1966, G. T . Prance 3039 ( INPA !, MG!, R); Km 163, margem da estrada, 15 February 1971, L. F . Coêlho 95 ( INPA !, MG!); Rio Preto da Eva , AM-10, estrada Manaus-Itacoatiara, km 64, picada I a 3340 m da margem da estrada, 27 August 1965, W. A . Rodrigues 7051 ( INPA !); Floresta Nacional do Jamari , Itapoã do Oeste, 05 August 1987, P . Sérgio 268 ( INPA !); 10 August 1987, P . Sérgio 277 ( INPA !); 14 August 1987, P . Sérgio 288 ( INPA !); 25 August 1987, P . Sérgio 302 ( INPA !); 26 August 1987, P . Sérgio 306 ( INPA !); 01 November 1987, P . Sérgio 319 ( INPA !); P . Sérgio 258 ( INPA !); 01 October 1987, P . Sérgio 318 ( INPA !); Porto Velho, Área do Reservatório da Usina Hidrelétrica de Samuel , 15 June 1986, C. A. C . Ferreira 7446 ( INPA !); Jaci-Paraná, setor 03, margem direita, próximo a parcela 47, 26 April 2010, C. B. A . Lima 61 ( RB!) .

Digital images — BRAZIL. Amazonas : Manaus vicinity, Road Manaus-Caracarai km 28, 10 November 1966, G. T . Prance 3039 ( K, NY) .

Vernacular names —Violeta.

Figures

FIGURE 5. Distribution map of species of Peltogyne in solid ground, relatively far from floodplains in the Amazon.

FIGURE 29. Peltogyne subsessilis W.A. Rodrigues.A, branch with leaflets, and inflorescence (scale: 3 cm). B, flower bud in pre-anthesis (scale: 3 mm). C, fruit, lateral view (scale: 1 cm). D, fruit, dorsal view (scale: 1 cm). Illustrated by Fábio Júnior Kochanovski.