Thyme-Leaved Sandwort is a fairly common little plant that grows in obscure corners of the landscape. Because of its small stature and nondescript appearance, it is frequently overlooked by passersby. What distinguishes Thyme-Leaved Sandwort from the similar-appearing Stellaria and Cerastium spp. (Chickweeds) is the structure of their flowers: the Chickweeds have petals that are notched at their tips, unlike the petals of the former. The other Sandworts that occur in Illinois have been reassigned to the Minuartia genus and the Moehringia genus. These Sandworts also have unnotched white petals, but their leaves are either smaller in size or linear in shape. Many of these species have flowers that are slightly larger and showier than those of Thyme-Leaved Sandwort.