Cladoradula perrottetii is a small plant that grows in an irregularly branching pattern. Its
stem has a complex structure composed of 10–14 layers of cells when viewed in cross-section. The stem contains two distinct types of cells: an outer layer (
cortex) of small, thick-walled brown cells, and an inner core () of larger, clear cells with reinforced corners called trigones. The leaves of
C. perrottetii have two distinct parts: a larger upper and a smaller lower lobule. The upper lobe is egg-shaped with a broadly rounded tip and smooth edges. It is large enough to completely cover the stem's width and sometimes extends beyond it. The leaf cells have thin walls but are strengthened at their corners with large nodular trigones. The lower lobule is triangular to egg-shaped and measures between one-third to one-half the length of the upper lobe. It covers about three-quarters of the stem's width or sometimes extends beyond it. When examined under a
scanning electron microscope, the leaf surface shows fine, irregular grooves that connect to form a net-like pattern. This feature was not previously known, as it cannot be seen under a regular
light microscope. The species does not produce reproductive structures called
gemmae. Male reproductive structures (
androecia) appear at the ends of branches with 5–12 pairs of overlapping specialized leaves called
bracts. ==Distribution and habitat==