A thin-stemmed shrub to c. 3 m tall, pushing through dense shrubby vegetation ; leaves with 2-6 pairs of leaflets (plus a terminal leaflet) ; leaflets deep green and matt above, always deeply notched apically, paler beneath. Flowers in slender racemes from brachyblasts on the main stem, or terminal amongst the leaves, tangerine orange ; calyx green, inflated with 4 triangular teeth, the upper tooth forked ; standard recurved, orange, with a green, irregular, basal eye, with brown, appressed hairs behind ; wings appressed to the keel, tangerine orange with a slender, daeker orange tip. Pods old, spirally dehiscent