Wiry perennial herb or suffrutex, erect or ascending, apically somewhat scan-dent, rooting from a short slender tap root, branching at the ground and only sparingly above; stems densely pubescent, tardily glabrescent. Leaves pinnate, trifoliolate, the leaflets alike, the lateral pair slightly smaller, thick, ovate, mostly (Panama) 1.5-2.5 cm long, apically rounded, mucronate, basally rounded or ob-tuse, the veins 3-5 on each side, prominent beneath, above ascending pilose to glabrous, beneath pilose to appressed pubescent; petiolules 1-1.5 mm long, drying