muricate
covered with short rough points or studs
[…] the small areola at base scarcely forked, closely muricate with silvery-gray spinellae on a brown background.
covered with crystals
Where it comes from
First attested in 1661; borrowed from Latin mūricātus (see -ate (adjective-forming suffix)), from mūrex (“a pointed rock or stone”).
Adapted from the Wiktionary entry muricate (CC BY-SA 4.0).