sterility of descendants of wild animals bred in captivity, ii. [160].
Broccoli, i. 323;
rudimentary flowers in, ii. [316];
tenderness of, ii. [310].
Bromehead, W., doubling of the Canterbury bell by selection, ii. [200].
Bromfield, Dr., sterility of the ivy and Acorus calamus, ii. [170].
Bromus secalinus, i. 314.
Bronn, H. G., bud-variation in Anthemis, i. 379;
effects of cross-breeding on the female, i. 404;