Polygala grandifolia, [205]

Polygonum baldschuanicum, [319]

Pomegranate, the, in the south-west, [205]

Poplars, [42], [480];

white, [42], [480];

with beautiful catkins, [66]

Poppy, Californian, [449]

Populus, [42], [181], [480];

tremuloides pendula, [64]

Potentilla, [32], [172], [181]