Lichen Thrope

Larry's nervous when moonlight takes hold
Feral fury just can't be controlled
But the doctor informs him
Pressure shocks and transforms him
And his cure is a this plant that grows mold.

Doc Edelmann believes that Larry Talbot's transformations are not triggered by moonlight, but by pressure on the brain, and believes he can use the mold from a mysterious plant to alter his skull, and cure him of his lycanthropy. The wonders of movie science! Onslow Stevens and Lon Chaney Jr in House of Dracula (1945). Title by lichen-minded David Cairns.