Leaves stipulate, leaflets oblong, (6-8)12(-14) x (2-)3-5 mm, glandular, pubescent, apex mucronate; petiole (4-)6-10 mm long; stipules semi-cordate to auriculate, 2-5(-6) x 2-3(-4) mm, glandular, pubescent. Inflorescence terminal, (50-80)90-120(-150) mm long, with (7-)14-20(-25) flowers, flowers 5-9 mm long; bracts orbiculate, glandular, (2-)4-5 x (1-)3-4 mm; bracteoles narrowly ovate, glandular, 3-5 x 0.6-1.3 mm. Calyx shortly bilabiate, glandular, pubescent; upper lobes acute, upper lip 5-6 mm long, the apices obtuse; upper sinus 1-2 mm deep; lateral sinus 2-3 mm deep; lower lip with very short teeth; lower lip 5-6 mm long, the apices obtuse; lower sinuses 0.5-1.0 mm deep, the tips obtuse. Corolla yellow; standard ovate-oblong, (5-)7-9 x (3-)5-6 mm, channelled claw 2-3 mm long; wing petals oblong, sculptured, 6-8 x 2-3 mm, with a linear claw 2-3 mm long; keel petals shorter than the wing petals, oblong, (5-)7-9 x (3-)5-6 mm, channelled claw 2-3 mm long; wing petals oblong, sculptured, 6-8 x 2-3 mm, with a linear claw 2-3 mm long; keel petals shorter than the wing petals, 5-6 x 2-3 mm, with a linear claw 2-3 mm long. Gynoecium narrowly oblong, glandular, pubescent, 3-4-ovuled. Fruit narrowly oblong, straight to somewhat falcate, (8-)15-20(-25) x 2-4 mm, glandular, hairy, (2-)4-6-seeded; seeds round, 1.6-2.0 x 1.6-2.0 mm, pale brown to dark brown.
More
Like M. adenodes but spines completely absent, upper calyx lobes broadly triangular and plants much more hairy. Pods straight to somewhat falcate, glandular, hairy.
Like M. adenodes but plant conspicuously hairy, spineless, and lower calyx lobes broadly triangular (not narrowly triangular).