Phalangium esculentum, iv, 60.
Phlox bifida, xi, 170.
— divaricata, xi, 169.
— glutinosa, xlv, 177.
— pilosa, xi, 169.
Physalis pubescens, xi, 170.
Piper leptostachyum, v, 287.
Planera or Siberian elm, xx, 377.
Plumbago floridana, v, 290.
Poa modesta, xlv, 45.