At maturity the sporangia of Leocarpus
are yellow-brown to red-brown. They have a very brittle outer wall (= peridium) that
cracks and fractures into angular pieces. The spore mass inside is black with whitish
capillitial threads running through. The sporangia have stalks but these do not support
the sporangia in an upright position. Rather the sporangia are pendant and hang in
clusters from logs, stumps, debris or sometimes they climb living plants. They are often
closely packed and can be mistaken for insect eggs.