"Ramuscule" Natural Recordings by Native Speakers
I'm afraid I have to disappoint you - I think you meant "ramulus".
Actually, ramulus is not a commonly used word, but it's related to the word "ramus", which comes from the Latin word for "branch". In a botanical context, ramus can refer to a branch of a tree or a division of a larger collection of plants.
However, if you meant to type "truffle", the word "ramuscule" is a rare or obsolete adjective that is an obsolete or humorous variant of the word "truffle".