Photinia glabra (Thunb.) Franch. & Sav. (Synonym : Photinia serrulata Lindl.)

Family : Rosaceae

Phragmites australis (Cav.) Trin. ex Steud. (Synonym : Arundo phragmites L.)

Family : Poaceae

Phragmites japonicus Steud. (Synonym : Phragmites serotinus Kom.)

Family : Poaceae

Phragmites karka (Retz.) Trin. ex Steud. (Synonym : Arundo vallatoria L.)

Family : Poaceae

Phryma leptostachya L. var. oblongifolia (Koidz.) Honda (Synonym : Phryma leptostachya L. var. asiatica H.Hara)

Family : Phrymaceae

Phtheirospermum japonicum (Thunb.) Kanitz (Synonym : Gerardia japonica Thunb.)

Family : Scrophulariaceae

Phyllanthus urinaria L. (Synonym : Phyllanthus lepidocarpus Siebold & Zucc.)

Family : Euphorbiaceae

Phyllanthus ussuriensis Rupr. & Maxim. (Synonym : Phyllanthus simplex Retz. var. chinensis Müll.Arg.)

Family : Euphorbiaceae

Phyllodoce caerulea (L.) Bab. (Synonym : Erica arctica Waitz)

Family : Ericaceae

Phyllospadix iwatensis Makino

Family : Zosteraceae