by tubers in the potato, ibid.;
in the dahlia, i. 385;
by bulbs in hyacinths, Imatophyllum miniatum, and tulips, i. 385;
in Tigridia conchiflora, i. 386;
in Hemerocallis, ibid.;
doubtful cases, i. 386-387;
in Cytisus Adami, i. 387-394;
probable in Æsculus rubicunda, i. 392;
summary of observations on, 406.
Buffon, on crossing the wolf and dog, i. 32;