comparative fertility of, in wild and tame states, ii. [112], [268];
white, ii. [332].
Pears, i. 350;
bud-variation in, i. 376;
reversion in seedling, ii. [31];
inferiority of, in Pliny's time, ii. [215];
winter nelis, attacked by aphides, ii. [231];
soft-barked varieties of, attacked by wood-boring beetles, ii. [231];
origination of good varieties of, in woods, ii. [260];
Forelle, resistance of, to frost, ii. [306].