Comesperma pallidum and Polygala isingii are described as new. These names are used in the account of Polygalaceae in the handbook to the Flora of Central Australia. Comesperma pallidum Pedley, species nova affinis C. ericini DC. foliis inflorescentiisque grandioribus et C. sylvestris Lindl. ramulis glabris foliis oblongis differt. Typus. Queensland: Mitchell District: Torrens Creek, March 1933, White 8703 (BRI, holotypus; BRI, K, isotypi). Frutex usque circa 2 m altus; ramuli angulates glauci glabri vel raro sparsim puberuli. Folia subsessilia oblonga obtusa mucronulata 15-25 x 2.5-5 mm, 4-6.5 plo longiora quam latiora crassa costa sola conspicua. Inflorescentia aliquantum densa circa 6 cm longa; pedicelli circa 4 mm longi; bracti et bracteoli decidui. Flores eburnei ad carinae apicem purpurascentes. Calyx: sepala externa ± aequilonga, 1.4-1.6 mm longa, sepala interiora concava obtusa 4.2-4.7 mm longa. Corolla: carina 4.3-4.8 mm longa, alis longiora; alae 3.8-4.4 mm longae. Pistillum glabrum. Capsula 10-15 x 3.5-4 mm, retusa umbonata, sensim basin versus attenuata. Semina 2.7-3 mm longa, subcylindrica 1.2-1.5 mm diam., coma basem capsulae complenti.