Eperua rubiginosa Miquel (1851: 12)

Fortes, Elenice A., Dos, Ilka P., Steege, Hans Ter, Aymard, Gerardo, Secco, Ricardo De S., Martins-Da-Silva, Regina Célia V. & Mansano, Vidal F., 2023, A taxonomic revision of the genus Eperua (Leguminosae, Detarioideae, Detarieae), Phytotaxa 617 (1), pp. 1-127 : 88

17. Eperua rubiginosa Miquel (1851: 12)

( Figures 12 , 51 , 52 )

Type (designated by Cowan 1975): — SURINAM. Without locality, s.d., Hostmann F. W. 229 (lectotype U [0003237] image!; isolectotypes K [000555108] image!, LE [00002234] image!) .

Tree 6.0–30.0(–40.0) m tall. Trunk 12.0–50.0(–91.0) cm in diameter, bark grayish, lenticellate. Stipules 1.2–3.5(– 4.1) × 0.7–2.2, free, or 1.3–7.7 × 3.0–5.0 mm, joined at the base, non-foliaceous, caducous. Leaves (2–)3(–4) or (3–5)4–5-jugate; petioles (0.4–)0.8–3.8(–8.0) cm long; rachis (2.3–)4.0–15.2(–18.5) or 7.3–25.0 cm long; petiolules (2.0–) 4.9–12.5 mm long; blades 5.1–16.0(–19.0) × 2.3–7.8 cm, coriaceous, glabrous, epunctate to inconspicuous pellucid-punctate, rarely pellucid-punctate, not discolorous to discolorous, equilateral, lower pair elliptic, sometimes lanceolate or ovate, middle pair elliptic, rarely lanceolate or ovate, upper pair elliptic, rarely lanceolate or obovate, apex attenuate to acuminate, mucronate, sometimes caudate, base symmetrical, lower pair base obtuse to rounded, rarely subcordate, middle pair base obtuse, rarely rounded, subcordate or cordate, upper pair base obtuse to cuneate, margin flat to slightly revolute, rarely revolute, secondary venation with one intramarginal vein, sometimes two, the vein closer to the margin not continuous, or, two intramarginal veins, sometimes one, the vein closer to the margin continuous or not, main vein straight, depressed on the adaxial surface, tertiary veins inconspicuous to conspicuous, areoles smaller, concave. Inflorescences terminal, sometimes axillary, panicle, main axis pendulous, lateral racemes erect, rarely patent, tomentulose, coppery, 46.0–280.0(–500.0) or 40.0–150.0 cm long, lateral racemes 1.8–11.5(– 16.5) cm long, alternate and spirally arranged; bracts not seen; bracteoles 1.9–3.8 × 1.2–2.3 mm, ovate, cucullate, apex gland absent, tomentose, coppery, caducous, attached to the lower portion of the pedicels; pedicel 9.7–33.0 mm long, 0.6–2.0 or 2.0– 3.3 mm in diameter, not twisted, tomentose, coppery; buds 0.6–2.1 cm long, 0.3–1.2 cm in diameter, tomentose, coppery. Flowers: hypanthium 3.1–9.6 mm long, 2.8–5.9 or 4.9–7.0 mm in diameter, cup-shaped, equilateral, tomentose, coppery; sepal 1.0–1.8(2.1) × 0.3–1.1 or 1.7–2.3 × 0.6–1.0 cm, elliptic to oblong, unequal, the outer ones larger, dorsal one cucullate, apex gland present on the outer ones, coppery, tomentose, inner sepals scarious marginally, coppery; adaxial petal 1.0–2.6 × 1.6–5.0 cm, oblate, non-tubular, apex rounded, crisped, base truncate, reddish, pink, magenta, purple-red to red, glabrous, punctate, papillose; petalodia 0.3–2.5 × 0.2–1.2 mm; stamens exserted, joined basally in a tube, longer filaments 3.0– 6.8 cm long, shorter filaments 2.2–5.5 cm long, tube equilateral, 0.4–4.8 mm long, glabrous, sometimes tomentulose in the sinuses, coppery, anthers 4.1–9.3 × 0.4–1.6 mm, rectangular; ovary 4.2–13.0 × 1.6–4.3 mm, oblanceolate, tomentose, coppery, 5 ovules, stipe 3.9–15.5 mm long, tomentose, style 2.0– 7.4 cm long, stigma capitate. Legumes 13.4–30.3 × 3.3–10.0 cm, stipe 1.0– 4.9 cm long, with flower remnants, falcate-oblanceolate, apex acuminate, acute to rounded, dorsal margin thickened, ventral margin entire, coppery, veins absent, tomentose, coppery. Seeds 1–3 per fruit, 2.0–5.0 × 0.7–3.0 cm, oblate, oblong, ovate to orbicular, dark-brown, centrally reddish-brown.

Conservation status:— Categorized as Least Concern (LC) according to the IUCN criteria ( IUCN 2012, IUCN Standards and Petitions Committee 2022). The estimated extent of occurrence for the species is 632,928.628 km 2 and the estimated area of occupancy is 436.000 km 2.

Eperua rubiginosa has to varieties presented here: E. rubiginosa var. rubiginosa and E. rubiginosa var. grandiflora .

Figures

FIGURE 12. Geographic distribution of Eperua glabra, E. rubuginosa var rubiginosa, and E. rubiginosa var. grandiflora.

FIGURE 51. Eperua rubiginosa var. rubiginosa: A. bark; B. leaves; C. fruiting tree; D. terminal portion of a long and pendulous inflorescence with erect lateral racemes; E. flower, lateral view; F. hypanthium, stamens, and carpel. Specimen, A, B, D–F: Fortes E.A. & Silva G.S. da 167. Photos, E.A. Fortes.

FIGURE 52. Eperua rubiginosa: A. leaf, var. grandiflora; B. flowering and fruiting branchlet, var. rubiginosa; C. adaxial petal, var. rubiginosa; D. base of the stamens joined in a tube, var. rubiginosa; E. anther and part of the filament, var. rubiginosa; F. hypanthium and carpel, var. rubiginosa; G. stigma and part of the style, var. rubiginosa. Specimens, A: Hostmann F.W.R. 229-A; B: Fróes R. de L. 26638; C–G: Pires J.M. et al. 51182. Illustrated by Carlos Alvarez.