The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . nis fasciata. A curve representing thebreadth of the main stems of all the individuals of myculture of 1895. The numbers under the base line indi-cate the breadth of the stems in centimeters, o, stemround; i, stems only flattened at the upper end; 2-20,stems flattened along their whole length. The height ofthe ordinates gives the number of individuals. Totalnumber of individuals 150. a, the peak of the atavists;h, that of the fasciated individuals.^ the fasciated individuals and the atavists d
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . nis fasciata. A curve representing thebreadth of the main stems of all the individuals of myculture of 1895. The numbers under the base line indi-cate the breadth of the stems in centimeters, o, stemround; i, stems only flattened at the upper end; 2-20,stems flattened along their whole length. The height ofthe ordinates gives the number of individuals. Totalnumber of individuals 150. a, the peak of the atavists;h, that of the fasciated individuals.^ the fasciated individuals and the atavists do occur, but arerelatively rare. The race produces by preference thetwo pure types, and the same thing is seen to happen inchance fasciations and in many other monstrosities. Icall to mind the relative rarity of hemi-tncotyls and hemi-syncotyls, both in the wild state and in the tricotylousBull. Scientif., he. cit., Vol. XXVII, p. 397. 522 The Inconstaiicy of Fasciatcd Races. and syncotylous races described in the first two chaptersof this part. Similar resuks mav be obtained with other fasciated. Fig. 119. Geranium molle fasciatum. Fasciated brancheswith broadened and spHt fruits, a, b, c. races. Thus I obtained in the fifth generation of my fas-ciated race of Aster Tripolhim, under biennial culture: WITHOUT FASCIATION WITH FASCIATION Cm. 1 2 3 4 5 6 Individuals 16 2 6 8 11 1 The Significance of the Atavists. 523 The curve representing these 35 plants would havea distinct peak representing the atavists and another cor-responding to the fasciated individuals of the averagebreadth of 3 ^ In Geranium inolle fasciatnm the variation of thischaracter proved, after a statistical examination of thematerial to l)e represented by a many-peaked curve. This t
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