Descripcion

Shrub, erect, branched, up to 2 meters tall, without a xylopodium. Stem cylindrical, striated, densely puberulent-hooked, sometimes becoming glabrous at maturity, rarely tomentose. Stipules 10-14 x 4-5 mm, ovate, non-auriculate, semi- amplexicaul, inserted perpendicularly at the base of the leaf petiole, free from each other, apex caudate, margin ciliate, glabrescent, striate on the outer surface. Leaves pinnate-trifoliolate, petiole 21-42 mm long, canaliculate, cylindrical, uncinate, rarely tomentose; rachis 12-20 mm long. Stipels 8-12 mm long, lanceolate, margin straight, glabrescent on the outer surface, persistent or caducous. Leaflets discolorous, membranaceous or chartaceous, venation eucamptodromous, primary and secondary veins prominent, indumentum densely villose or tomentose on the primary, secondary and tertiary veins on the abaxial surface, adaxial surface puberulous and sparsely tomentose, uncinate hairs covering adaxial surface; terminal leaflet 8,2-11 x 5-9,1 cm, elliptic, lanceolate, ovate or rhombic, base oblique, obtuse, subcordate or truncate, apex acuminate, obtuse or retuse; lateral leaflets 5,6-7 x 2,8-4,5 cm, the same shape as the terminal leaflet. Inflorescence a terminal panicle; 27,2-45,5 cm long, hispid and uncinate, 2-4 flowers per node; primary bract 6-7 mm long, ovate-lanceolate, margin straight, glabrescent, caducous, veins conspicuous on the outer surface; secondary bract 1-1,5 mm long, subulate, margin ciliate hispid and puberulous-uncinate on the outer surface, caducous, veins inconspicuous on the outer surface; pedicel 6-9 mm long, densely hispid and puberulous-uncinate. Flowers 6-9,5 mm long; calyx bilabiate, tube campanulate, 1-1,5 mm long, hirsute and puberulous-uncinate on the outer surface; upper lip bifid, the second teeth joined for ca. ¾ of their length; lower lip trifid, lateral tooth triangular, 1-1,5 mm long, central tooth triangular, 2-2,5 mm long; corolla white, lilac when young, 7-8 x 7-8 mm, broadly obovate, apex obcordate, maculate at the base, claw ca. 0,5 mm long; wing petals 7,5-9,5 x 3-4 mm, oblong, apex obtuse, claw 0,5-1 mm long; keel petals 8-9,5 x 2,5-3 mm, narrowly obovate, apex subacute, with callosities, claw 2,5-3 mm long; androecium monadelphous, 6-9,5 mm long, vexillary stamen partially fused with the others from the base 2-3 mm long; ovary 3,5-4 mm long, tomentose, stipe ca. 1 mm long. Loment 1,5-2,4 cm long, stipe 2-3 mm long, hirsute, margins sinuate, indehiscent, membranaceous or subcoriaceous, veins conspicuous even when fresh, densely hirsute and sparsely puberulous-uncinate. Seed 2-2,5 x 1-1,2 mm, oblong with hilum subcentral.