Tridentea gemmiflora is a clump-forming succulent with four-angled stems that grow up to 3.2 inches (8 cm) tall. There are long, soft, conical teeth on the ridges of the grey to greenish stems tipped with tiny leaves. The purple-black, flat-faced flowers are sometimes barred and mottled with creamy yellow, sometimes mottled a paler purple. The flowers grow in one inflorescence per stem.
