The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . ally those varieties known asFancy-flowers.^ In this case the color is in some wayconnected with the amount of doubling, which often ex-hibits sectorial variations and bud-variations at the same time.^ Striped Dahliasgive rise to these partialvariants sometimes veryrarely, but sometimes insuch abundance that agood variety is often ex-posed to the danger ofbeing lost thereby. Inmost of the cases we haveto do with two types whichare manifested in variousdegrees of association andseparation. Case
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . ally those varieties known asFancy-flowers.^ In this case the color is in some wayconnected with the amount of doubling, which often ex-hibits sectorial variations and bud-variations at the same time.^ Striped Dahliasgive rise to these partialvariants sometimes veryrarely, but sometimes insuch abundance that agood variety is often ex-posed to the danger ofbeing lost thereby. Inmost of the cases we haveto do with two types whichare manifested in variousdegrees of association andseparation. Cases in whichmore than two forms arecombined and which there-fore may produce by bud-variation two or moretypes on the same plant,besides the normal one,have been described; but they were probably dissociation seems to be a very rare phenomenon,but of Mad. H. Vourchy, a variety which usually has ^ See Groombridges Treatises on Florists Flozvers; The Dahlia,1853, and the extensive literature which has appeared since. Vilmorin-Andrieux, Les iieurs de pleine terre, first edition, Fig. 20. Papaver nudicaule. Yel-low variety with dark orangestripes. The Origin of Striped Flozvcrs. 117 white flowers with red stripes, I have seen a head whoseouter ray florets were dark red whilst the inner onesformed a disc of pure white with only very occasionalred stripes. In the center the unmodified fertile yellowdisc florets were seen. I have observed the same phe-nomenon in a few other cases. The striped varieties of Cyclaiiicn pcrsiciun are saidto bear in some instances only variegated flowers oneyear and from the same bulb uniformly colored atavisticflowers the next year. Centaurca Cyanns, the blue corn flower or blue bottle,has a brown variety with double flowerheads wdiich ishighly variable in color; it is far from being fixed yet,as a plantbreeder in Erfurt expressed it to me. I culti-vated it for five years, always selecting the purest anddarkest brown specimens in sma
Size: 1259px × 1986px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicagoopencourtpu
