The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . 113 of reversion of varieties to their parent species, and there-fore to suggest that the characters of the latter were notlost when the variety originated, but only became latent. § 13. VILMORINS SUGGESTION AS TO THE ORIGIN OF STRIPED FLOWERS. One of the oldest and best-known instances both ofbud - variations and ofsectorial splitting is af-forded by certain so-called variegated gardenflowers and particularlyby the annual Larkspurs,Delphiniiim Ajacis andD. Consolida. All phasesof the phenomen
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . 113 of reversion of varieties to their parent species, and there-fore to suggest that the characters of the latter were notlost when the variety originated, but only became latent. § 13. VILMORINS SUGGESTION AS TO THE ORIGIN OF STRIPED FLOWERS. One of the oldest and best-known instances both ofbud - variations and ofsectorial splitting is af-forded by certain so-called variegated gardenflowers and particularlyby the annual Larkspurs,Delphiniiim Ajacis andD. Consolida. All phasesof the phenomenon canbe followed in this casewith great ease, for fromtime immemorial thesevarieties have borneflowers which show themost varied striping ona background of a dif-ferent color; and theyalso produce flowers ahalf or a third or someother fraction of whichuniformly bears the colorwhich commonly onlyappears in stripes (Fig. 19). Flowers of this Fig. 17. Delphinium Consolida stria-1 . , , , tuni plenum. A plant in flower. kmd may be scattered over the whole plant, but are oftener distributed in such. 114 Atavism. a way that those on one side of a spike are uniform andthose on tlie other striped.^ Flowers which are insertedat the l)onn(laries of the two regions exhihit on one sidethe color of one sector and on the other half, the stripesof the other. A diagram of such a branch is shown inFie. 1^ in which the flowers Nos. 1. 4, 6, 9, and 11 aredark blue, Xos. 2, 5, 7, 10, 12, and 13 pale red with scat-
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