Arbusto, árbol o (mucho más frecuente) liana, las ramitas pardo brillante, ferrugíneo-pubescentes con tricomas adpresos a glabrescentes; estípulas ca. 0.5–0.6 cm, deltadas o deltado-lanceoladas, deciduas. Hojas con 5–9(–11) folíolos alternos, 3–8 X 1.5–3.5 cm, oblongo-lanceolados a ovado-oblongos u ovados, acuminados en el ápice, glabros en el haz, esparcidamente dorado o amarillento-pubescentes con tricomas adpresos en el envés, con ca. 15–26 nervios secundarios poco diferenciados por lado. Infls. apretadamente paniculadas, 2–6 cm, el raquis esparcidamente ferrugíneo-pubescente. Fls. moradas o púrpura oscuro, verdoso amarillento interna- mente; cáliz ca. 2 mm; pétalos 5–9 mm. Frs. 5–7 X ca. 2 cm, glabros, ovado-reniformes y sin ala.
Leaves 11-16.5 cm long; leaflets 9-11(-13), elliptic, 2-7 x 1.5-2.8 cm. Flowers 9-10 mm; style curved, 8 mm long, thicker, tomentose to hirsute on the central part. Fruit a one-seeded samara 8-11 x 2-2.5 cm, the wing well-developed; seed 2.5-3 cm long.
Liana or scandent shrub, 3-15 m tall, 5-10 cm dbh. Stipules caducous, 2 x 2 mm; rachis brown-tomentose; leaflets glabrous above, yellowish-brown tomentose below, the margin swollen below, the base rounded or obtuse, the apex obtuse to acuminate, with a mucro 1 mm long or less; midvein prominent; secondary venation camptodromous; tertiary venation reticulate, obscure; petiolule 1.5-2 mm long. Inflorescence an axillary or terminal pseudopanicle, 8-24 cm, composed of racemose branches, these clustered into fascicles 2-3.5 cm long; peduncle brown-tomentose to-hirsute. Flowers purple, sessile; bracteoles ovate, 3 mm; calyx 3-4 mm long, pubescent, with five obtuse teeth; banner 8-10 x 6-9 mm, woolly on adaxial surface; keel petals 6-8 x 3-4 mm, sparsely hirsute above; wing petals 6-8 x 2.6-4 mm, hirsute above, with lamellate sculpturing; stamens diadelphous, 6-8 mm long, the free part of filaments 1-1.5 mm long; style curved.
Leaves 20-30 cm long; leaflets 11-15, narrowly elliptic, 3.5-8 x 1.4-2.3 cm. Flowers 6-9 mm long; style curved, 7 mm long, thicker above the center, hirsute. Fruit lunate, 3.3-7 x 2 cm, 6 mm in thickness at maturity, rough textured, glabrous or nearly so.
Stem: shoot unarmed; section transverse cylindric. Leaf: stipule foliaceous; pattern of the venation of the leaflet brochidodromous; form of the leaflet elliptic/ovate/lanceolate; apex of the leaflet acuminate/acute; base of the leaflet rounded/obtuse; side adaxial of the leaflet glabrescent; side abaxial of the leaflet with indumentum. Inflorescence: type panicle; position axillary/terminal; bract(s) foliaceous. Flower: calyx campanulate; colour of the petal purple; vexillum with indumentum present; androecium monadelphous. Fruit: type nutlet; seed chamber smooth.
Tallo: ramo(s) inerme(s); sección transversal(es) cilíndrica(s). Hoja: estípula(s) foliacea(s); patrón de venación de los foliolo(s) broquidódromo(s); forma de los foliolo(s) elíptico(s)/ovado(s)/lanceolado(s); ápice(s) de los foliolo(s) acuminado(s)/agudo(s); base de los foliolo(s) arredondada(s)/obtusa(s); face(s) adaxial de los foliolo(s) glabrescente(s); face(s) abaxial de los foliolo(s) con indumento. Inflorescencia: tipo panícula(s); posición axilar(es)/terminal(es); bractea(s) foliacea(s). Flor: cáliz campanulada(s); color de las pétala(s) purpurea; vexilo(s) con indumento presente(s); androceu monadelfo. Fruto: tipo núcula(s); núcleo seminífero liso(s).
Caule: ramo(s) inerme(s); seção transversal(ais) cilíndrica(s). Folha: estípula(s) foliácea(s); padrão de venação dos folíolo(s) broquidódromo(s); forma dos folíolo(s) elíptico(s)/ovado(s)/lanceolado(s); ápice(s) dos folíolo(s) acuminado(s)/agudo(s); base dos folíolo(s) arredondada(s)/obtusa(s); face(s) adaxial dos folíolo(s) glabrescente(s); face(s) abaxial dos folíolo(s) com indumento. Inflorescência: tipo panícula(s); posição axilar(es)/terminal(ais); bráctea(s) foliácea(s). Flor: cálice(s) campanulado(s); cor das pétala(s) purpúrea; vexilo(s) com indumento presente(s); androceu monadelfo. Fruto: tipo núcula(s); núcleo seminífero liso(s).
In Guayana, Venezuela, Ecuador, and Brazil. Usually in inundated (vairzea, igapé)
In the central and southern part of Amazonian Colombia and adjacent Ecuador; and also in Antioquia, trans-Andean Colombia.
