Pennyroyal may refer to:-
Mentha pulegium (pennyroyal or European pennyroyal), a herb,
Hedeoma pulegioides (American or false pennyroyal),
Pennyroyal Tea, a track by Kurt Cobain of Nirvana,
Pennyroyal Plateau, a region of Kentucky, USA, also known locally as "Pennyrile",
Pennyrile Parkway, a highway in Kentucky,
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