P. acaulis may refer to: Pedicularis acaulis, a perennial green root parasite plant species in the genus Pedicularis Penstemon acaulis, a plant species in the genus Penstemon Peperomia acaulis, a radiator plant species in the genus Peperomia Phacelia acaulis, a scorpionweed species in the genus Phacelia Phoenix acaulis, a palm species endemic to northern India and Nepal Primula acaulis, a garden plant species
Synonyms Podococcus acaulis, a synonym for Podococcus barteri, a palm species found in tropical Africa