Mimbulus mimbletonia

Mimbulus mimbletonia is described as "appear[ing] to be a small grey cactus in a pot, except that it was covered with what looked like boils rather than spines" (OotP 186). This genus name "mimbulus" may be related to the real genus "Mimulus", as these plants are used as folk remedies for nervousness, timidity and general shyness, the very traits of Neville Longbottom himself.

The Mimbulus Mimbletonia is a very rare plant. The origin of this plant is surmised to be in Assyria as that is where Great Uncle Algie acquired it. It is most notable for its pulsating nature and its unique defensive mechanism. When the Mimbulus Mimbletonia is prodded, stinksap is squirted out from the boils on the surface of the plant. Stinksap is a non-poisonous liquid and is described as dark green and smelling like "rancid manure" (OotP 187). Neville Longbottom demonstrates its defensive mechanism for Harry Potter on the Hogwarts Express, covering the compartment and the people in it with Stinksap. Later on we discover that further onto the plant's development, it makes "odd crooning noises when touched"(OotP 889.)

Mimbulus Mimbletonia is also used as the password for the Gryffindor's common room at the start of the year.

The plant is also mentioned by Hermione when retorting to Ron that she doubts "[he] would find a woman who sulked for half an hour because Madame Rosmerta didn't laugh at their joke about the hag, the healer and the Mimbulus Mimbletonia,"(HBP 468) after his comment about women being easily upset. Sadly, the full joke is never told.