leprose
/ˈlɛprəʊz/ /ˈlɛprəʊs/Botany
adjective
Having a scaly or powdery appearance; lepidote; especially designating crustose lichens in which the surface of the thallus is granular or powdery.
Origin
Early 19th century; earliest use found in Thomas Nuttall (1786–1859), botanist. From scientific Latin leprosus, specific use of post-classical Latin leprosus; compare -ose.