action of, ii. [108];
injurious action of, in some orchids, ii. [134]-[135];
resistance of, to injurious treatment, ii. [164];
prepotency of, ii. [187].
Pollock, Sir F., transmission of variegated leaves in Ballota nigra, i. 383;
on local tendency to variegation, ii. [274].
Polyanthus, ii. [21].
Polydactylism, inheritance of, ii. [12]-[16];
significance of, ii. [16]-[17].
Polyplectron, i. 255.