Pentstemon cordifolius, in the south-west, [203]

Peraphyllum, [31]

Pergolas, weeping trees as, [89]

Periploca, [31]

Periwinkles, [185]

Pernettyas, the, [18], [31], [83], [172], [181], [250], [406];

in greenhouse, [276]

Persimmon, the, in the south-west, [197]

Phellodendron amurense, [479]

Philadelphus, [31], [181], [256], [407]-[408];