The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . 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 c
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . 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. Fig. 120. Geranium mollc fasciatnm. a, fruit containing6 single fruits; b, split into one group of 4 and one of5; c, split into three groups containing 5—7 and 5 singlefruits; d, one group has 16 and the other 5 divisions offruil and stigmas; c, fruit with ^2> divisions and stigmas(1895). race- is remarkable from the fact that tlie stems have,as is v^ell known, a sympodial structure (Fig. 119),Therefore the anomaly affects, as a rule, one member ofthe sympodium only; but sometimes it extends to twoor more adjacent ones. These are again succeeded bvatavistic members. Each part terminates n^ a flower. ^ Revue gcncralc dc hotaniqiic, 1899, Vol. XT, p. 143.^ Bntanisch Jaarh. Gent, 1894. p. 81: and 1897. p. 67. 524 TJie Inconstancy of Fasciatcd Races. In the fasciated parts these flowers are broadened andusually more or less divided, the fruit sometimes form-ing a flat structure (Fig. 120^), with or without one ortwo lateral fruits in the same flower (Fig. \20 c and d).Often these lat
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