Pteris semipinnata L. (Synonym : Pteris alata Poir.)

Family : Pteridaceae

Pteris terminalis Wall. ex J.Agardh (Synonym : Pteris semipinnata L. var. aequata Miq.)

Family : Pteridaceae

Pternopetalum tanakae (Franch. & Sav.) Hand.-Mazz. (Synonym : Carum tanakae Franch. & Sav.)

Family : Apiaceae

Pterocarya rhoifolia Siebold & Zucc. (Synonym : Pterocarya sorbifolia Siebold & Zucc.)

Family : Juglandaceae

Pterocarya stenoptera C.DC. (Synonym : Pterocarya stenoptera DC. var. kouitchensis Franch.)

Family : Juglandaceae

Pterostyrax hispidus Siebold & Zucc. (Synonym : Decavenia micrantha (Siebold & Zucc.) Koidz.)

Family : Styracaceae

Pterygocalyx volubilis Maxim. (Synonym : Crawfurdia Pterygocalyx Hemsl.)

Family : Gentianaceae

Pterygopleurum neurophyllum (Maxim.) Kitag. (Synonym : Edosmia neurophyllum Maxim.)

Family : Apiaceae

Ptilagrostis alpina (F.Schmidt) Sipliv. (Synonym : Stipa alpina (F.Schmidt) Petrov)

Family : Poaceae

Puccinellia chinampoensis Ohwi

Family : Poaceae