Crassula expansa subsp. fragilis is an evergreen low-growing or groundcover type of perennial plant with masses of tiny succulent leaves. The height reached is about 25 cm and the spread may get to about 50 cm. The plant produces tiny white five-pointed star flowers on the tangled cushion of slender stems and tiny leaves. Flowers may be seen from late spring to autumn.
The leaves are flattened succulent discs, sometimes slightly elliptic or obovate. While the leaves are fresh to pale green, the stems are pinkish to maroon. Fine whitish hairs may be scattered along the leaf and stem surfaces. The stems are brittle as the subspecies epithet fragilis indicates. The Afrikaans common name of strepies-crassula (little stripes crassula) has been encountered (www.kumbulanursery.co.za; www.plantsinstock.co.za).