Carmichaelia glabrescens or the pink-flowering tree broom is endemic to the South Island, where it is found naturally in Marlborough - south of the Awatere Fault. Found in the Clarence and Waima Ure River Valley’s and on slopes of the seaward Kaikouras. It is found in lowland to montane area, in alluvial terraces, gorges, cliff faces and steep valley sides, from sea-level to 1200m asl. It is  an upright shrub to small tree up to 10m tall, with many slender weeping branches that are near leafless. It has masses of pink flowers with dark pink veins from November to January, that are great at attracting bees. It is very tolerant of dry and windy conditions, and frost. Carmichaelia glabrescens is very similar to Carmichaelia carmichaeliae. They have a similar growth habit, branchlets, and flowers. Carmichaelia carmichaeliae differs from Carmichaelia glabrescens by the pods being weakly constricted between the seeds, the seed outline often visible through the dry fruit wall, and the lower filaments are usually persistent on mature fruits. Carmichaelia glabrescens pods are shorter and broader, there are no constrictions between seeds, the seed outline is not visible through the fruit wall, and the lower filaments are usually absent from mature fruits.