Sanrobertia gypsophila is a perennial, herbaceous plant that blooms with lilac rays and yellow disk centers during the months of August through October.

Most of the plant may be slightly strigose with very short (0.1–0.5 millimeters[a]), appressed, white, and pointed hairs.

[2] Numerous alternate and simple blue-green leaves[3] grow on the stems and branches, and they are usually somewhat clasping at their bases.

Their margins (edges) are smooth, shapes are mostly oblong-lanceolate, and tips are curved slightly outward and covered with a few tiny spines.

[2] The cladogram shows that the genera Canadanthus, Ampelaster, and Sanrobertia are the earliest diverging members of Symphyotrichinae, developing their morphologies prior to the related species in Symphyotrichum, Almutaster, and Psilactis.