Parasenegalia skleroxyla

Tree to 20 m tall; bark gray to light brown, smooth; twigs light to dark purplish brown, not flexuous, terete, glabrous to lightly puberulent; short shoots absent; prickles absent. Leaves alternate, 60 – 160 mm long; stipules purplish brown, triangular, symmetrical, flattened, straight, herbaceous, 0.4 – 0.9 mm long, 0.3 – 0.7 mm wide near the base, puberulent, tardily deciduous; petiole flat to rarely adaxially grooved, 8 – 28 mm long, puberulent to rarely glabrous; petiolar gland solitary, located on the upper third of the petiole, usually just below the lowermost pinna pair, sessile, oval to orbicular, 0.7 – 1.8 mm across, apex flattened to depressed, glabrous; rachis flat to rarely adaxially grooved, 35 – 140 mm long, puberulent, an oval gland 0.4 – 1.3 mm across between the uppermost 1 to 7 pinna pairs, apex flattened to depressed, glabrous; pinnae (3) 5 to 16 pairs / leaf, 45 – 95 mm long, 5 – 10 mm between pinna pairs; paraphyllidia 0.1 – 0.3 mm long, usually absent; petiolule 0.7 – 2.2 mm long; leaflets 30 to 65 pairs / pinna, opposite, 0.7 – 1.6 mm between leaflet pairs, oblong, 4.5 – 9.5 X 0.9 – 2.1 mm, glabrous, lateral veins obvious, 1 to 3 veins from the base, base oblique, truncate on one side, margins not ciliate, apex acute to acuminate, midvein subcentral. Inflorescence a loosely 100 - to 230 - flowered cylindrical spike, 60 – 150 X 10 – 15 mm, 1 to 4 from the leaf axils; peduncles 6 – 25 X 0.8 – 1.3 mm, puberulent; receptacle not enlarged, elongated; involucre absent; floral bracts spatulate, 0.3 – 0.7 mm long, puberulent, early deciduous. Flowers sessile, white to cream (yellowing with age); calyx 5 - lobed, 0.7 – 1.5 mm long, puberulent; corolla 5 - lobed, 1.8 – 2.4 mm long, usually puberulent, lobes 1 / 4 the length of the corolla; stamens 40 to 80; stamen filaments 4.5 – 7 mm long, distinct to rarely slightly fused at the base; anther glands present; ovary glabrous, sessile to subsessile, the stipe to 0.2 mm long. Legumes straight, flattened, not constricted between the seeds, oblong, 75 – 160 X 13 – 25 mm, coriaceous, transversely striated, glabrous, eglandular, tardily dehiscent along both sutures; stipe 2 – 7 mm long; apex broadly acute to obtuse, short beaked; seeds uniseriate, no pulp, dark brown, oval to oblong, strongly flattened, narrowly winged, 8 – 12 X 6 – 8 mm, smooth; pleurogram U-shaped to circular, covering most of the seed.