Phillips, R.; Rix, M.: Exciting Foliage Plants and how to grow them. Pan Books, 1999
Pan Plant Chooser Series
Phillips, R.: Grasses, Ferns, Mosses and Lichens of Great Britain and Ireland. Pan Books, 1980
Phillips, R.: The Photographic Guide to Identify Wild Flowers of Roadsides and Waste Places. Elm Tree Books, 1986
Phillips, R.: Trees in Britain, Europe and North America. Pan Books, 1978
Pilous, Z.; Duda, J.: Klic k urcováni mechorostu CSR. Ceskoslovenská Akademie VED, 1960
Pohler, A.: Zauberhafte Alpenblumen. Verlag Lohmann, 1985
Polunin, I.: Plants and Flowers of Malaysia. Times Editions, 1988
Polunin, I.: Plants and Flowers of Singapore. Times Editions, 1987
Polunin, O.; Walters, M.: A Guide to the Vegetation of Britain and Europe. Oxford University Press, 1985
Polunin, O.: Flowers of Europe. A field guide. Oxford University Press, 1969
Polunin, O.; Stainton, A.: Flowers of the Himalaya. Oxford University Press, 1997
Oxford India Paperbacks
Porley, R.; Hodgetts, N.: Mosses and Liverworts. Collins, 2005
The New Naturalist Library
Pott, R.: Die Pflanzengesellschaften Deutschlands. Ulmer Verlag, 1992
Praglowski, J.: Coriariaceae.
World Pollen Flora (ed. by G. Erdtman): 1.
Praglowski, J.; Gyllander, K.: Globulariaceae.
World Pollen Flora (ed. by G. Erdtman): 4.
Preston, C. D.; Stace, C. A.; Pearman, D. A.: Hybrid Flora of the British Isles.
Prijanto, B.: Batidaceae.
World Pollen Flora (ed. by G. Erdtman): 3.
Prijanto, B.: Gyrostemonaceae.
World Pollen Flora (ed. by G. Erdtman): 2.
Primack, Richard B.; Corlett, R.: Tropical Rain Forests. An Ecological and Biogeographical Comparison. Blackwell, 2005
Probst, R.: Wolladventivflora Mitteleuropas. Naturhistorisches Museum Slothurn, 1949