Plants, selections of, for old walls, ruins, or rocky slopes, [170]
Plants, selections of hardy, [163]
Plants suited for dry and gravelly soil, [170]
Polygonum cuspidatum, [152]
Poppy, [153]
Primrose, Evening, [151]
Pulmonaria, [154]
Pyrethrum serotinum, [154]
Rabbits and Woods, [173]
Reasons for the system, [4]