Tephrosia is a genus of about 100 species of mainly herbs and sub-shrubs widely dispersed around the world in warmer climes.  [RHSD].  Macarthur’s Tephrosia sp. is possibly Tephrosia grandiflora (L’Hére. ex Ait.) Pers., from South Africa, the only species naturalised in the Sydney area.  [Beadle].  This is a frost-tender evergreen shrub with pinnate leaves composed of up to 7 pairs of lance-shaped leaflets, to 2cm long, and short terminal or axillary racemes of red to purple, pea-like flowers.  To 1m.  [RHSD, Hortus].