The sword-shaped leaves of Corymbium glabrum have parallel veins. These conspicuous veins are visible on the curved leaves in the photo taken in Fernkloof during a hot December. The leaves become about 15 cm long and 2 cm wide.

Flowers are produced on stalks in flat-topped, dense corymbs accounting for the generic name. Glabrum means smooth or hairless. Flower colour is pink or white; some sources in the literature say purple or magenta as well, which may indicate more colours or more colour names. Each flower has five spreading, narrow lobes and smooth bracts below.

Flowering commences late in spring, continuing to midsummer (Manning, 2007; Vlok and Schutte-Vlok, 2010).