Rhynchosia minima  

Perennial suberect or climbing herb density of indumentum and glands variable. Branches twiggy, ridged , glabrous to densely tomentose with short and long hairs. Hairs leaves petiolate; leaflets mostly rhombic, c. 12-35 X 12 -30, usually basally oblique, sparsely to densely gland - dotted beneath, glabrescent above to densely pubescent, pubescent to densely tomentose, beneath, acute. Racemes axillary, many flowered, usually longer than subtending leaves. Flower yellow, small 6-10 mm long calyx sparsely pubescent to densely pubescent, usually with glands or sometimes lacking glands. Pods glabrous to densely hairy, up to 15 X 6 mm, falcate oblong, 2 seeded
Represented by 4 varieties in Saudi arabia